Breast pump

Abstract

The utility model relates to the field of mother and baby products, and provides a breast pump which comprises a breast pumping assembly, a milk storage assembly and a negative pressure mechanism. The breast sucking assembly is attached to the breast of a user and is used for sucking milk from the breast of the user; the milk storage assembly is communicated with the milk sucking assembly and is used for receiving and storing milk sucked out from the milk sucking assembly; the negative pressure mechanism is used for directly or indirectly applying negative pressure to the breast pumping assembly; the milk storage assembly comprises a milk storage container for storing milk and a cover body connected with the milk storage container; the cover body is provided with an air channel communicated with the atmosphere, and the milk storage container is communicated with the atmosphere through the air channel. According to the breast pump, the milk storage container is communicated with the atmosphere through the air path in the cover body, so that breast milk can be prevented from being brought out when air is exhausted, and the breast pump has a better milk overflowing prevention effect.

Description

Technical Field

[0001] The utility model relates to the field of mother and baby products, in particular to a breast pump. Background Art

[0002] As is well known, the best nutrition for infants is breast milk. The World Health Organization recommends breastfeeding infants for at least one year. However, postpartum mothers usually return to work a few weeks after giving birth. In order to provide breast milk to infants in a timely manner and relieve discomfort such as swelling and pain caused by failure to empty the breasts in time when breast milk secretion is relatively high, mothers can use a breast pump to extract breast milk and properly store the extracted milk, which can provide continuous breast milk when the infant needs it.

[0003] To achieve the above purpose, it is usually completed by a breast pump. The mother presses her breast tightly against the funnel-shaped milk extraction component, and applies negative pressure through a negative pressure mechanism to achieve the purpose of extracting breast milk.

[0004] However, in the related art, the exhaust hole of the breast pump is usually arranged on the side wall of the milk storage container. When the gas in the milk storage container is discharged, the gas may carry out breast milk, resulting in the overflow of breast milk from the milk storage container. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a breast pump that can reduce the occurrence of milk overflow.

[0006] To solve the above problems, the utility model provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a breast pump, which includes: a milk extraction component, a milk storage component, and a main machine component;

[0008] The milk extraction component fits against the user's breast and is used to extract milk from the user's breast;

[0009] The milk storage component is communicated with the milk extraction component and is used to receive and store the milk extracted from the milk extraction component;

[0010] The negative pressure mechanism is used to directly or indirectly apply negative pressure to the milk extraction component;

[0011] The milk storage component includes a milk storage container for storing milk and a cover body connected to the milk storage container;

[0012] The cover body is provided with an air path communicating with the atmosphere, and the milk storage container is communicated with the atmosphere through the air path.

[0013] In some embodiments, the milk storage component further includes an air path component connected to the cover body and the milk storage container;

[0014] The gas path component opens the gas path as the negative pressure mechanism applies negative pressure;

[0015] The gas path component closes the gas path as the negative pressure mechanism stops applying negative pressure.

[0016] In some embodiments, the cover body includes a through hole communicating with the milk storage container, and the gas path component is disposed in the through hole of the cover body;

[0017] The gas path component contracts as the negative pressure mechanism applies negative pressure. When contracting, a first gap is formed between the gas path component and the inner wall of the edge of the through hole, and the milk storage container communicates with the atmosphere through the first gap;

[0018] The gas path component expands as the negative pressure mechanism stops applying negative pressure. When expanding, the gas path component seals the through hole and closes the gas path.

[0019] In some embodiments, the cover body includes a first limiting portion surrounding the through hole. The first limiting portion includes a first end face close to the milk sucking component, and the gas path component includes a second limiting portion;

[0020] At least one exhaust channel communicating with the first gap is provided between the second limiting portion and the first end face of the first limiting portion;

[0021] The gas path component contracts as the negative pressure mechanism applies negative pressure, and the milk storage container communicates with the atmosphere through the first gap and the exhaust channel.

[0022] In some embodiments, the gas path component further includes a third limiting portion, and the first limiting portion is located between the second limiting portion and the third limiting portion.

[0023] In some embodiments, the first limiting portion further includes a second end face close to the milk storage container, and at least one pressure relief channel communicating with the first gap is provided between the third limiting portion and the second end face of the first limiting portion;

[0024] The gas path component contracts as the negative pressure mechanism applies negative pressure, and the milk storage container communicates with the atmosphere through the pressure relief channel, the first gap, and the exhaust channel.

[0025] In some embodiments, the exhaust channel and the pressure relief channel are oppositely arranged.

[0026] In some embodiments, the pressure relief channel is a pressure relief groove formed on the third limiting portion and recessed towards the through hole.

[0027] In some embodiments, the exhaust passage is an exhaust groove provided on the end face of the second limiting portion close to the first limiting portion, or the exhaust passage is an exhaust groove provided on the first end face of the first limiting portion.

[0028] In some embodiments, the milk suction assembly is detachably connected to the cover body, a second gap communicating with the atmosphere is provided between the cover body and the milk suction assembly, and the second gap communicates with the exhaust passage.

[0029] In some embodiments, the cover body includes an outer side wall connected to the milk storage container, a bottom wall connected to the outer side wall, and a first limiting portion connected to the bottom wall; the air path assembly includes a first connecting member; the milk suction assembly includes a second connecting member hermetically connected to the first connecting member.

[0030] In some embodiments, the air path assembly includes an elastic one-way valve;

[0031] The one-way valve closes the valve and opens the air path as the negative pressure mechanism applies negative pressure;

[0032] The one-way valve opens the valve and closes the air path as the negative pressure mechanism stops applying negative pressure.

[0033] In some embodiments, the cover body is provided with an air hole communicating the milk storage container and the atmosphere.

[0034] In some embodiments, the cover body is detachably connected to the milk storage container.

[0035] The beneficial effect of the present utility model is that by enabling the milk storage container to communicate with the atmosphere through the air path in the cover body, it is possible to prevent breast milk from being carried out when gas is discharged, so that the breast pump has a better anti-overflow milk effect. Description of the Drawings

[0036] Figure 1 is a perspective view of the breast pump provided by the embodiment of the present application.

[0037] Figure 2 is a first cross-sectional view of the breast pump provided by the embodiment of the present application.

[0038] Figure 3 is a structural schematic diagram of a cover body provided by the embodiment of the present application.

[0039] Figure 4 is Figure 3 a cross-sectional view taken at B-B in

[0040] Figure 5 is Figure 2 an enlarged view of A in

[0041] Figure 6 It is the front view of the gas path component provided by the embodiment of the present application.

[0042] Figure 7 It is the perspective view of the gas path component provided by the embodiment of the present application.

[0043] Figure 8 It is the second cross-sectional view of the breast pump provided by the embodiment of the present application.

[0044] Figure 9 It is Figure 8 the enlarged view of the position C in

[0045] Figure 10 It is the third cross-sectional view of a breast pump provided by the embodiment of the present application.

[0046] Figure 11 It is Figure 10 the enlarged view of the position D in

[0047] Figure 12 It is the explosion schematic diagram provided by the embodiment of the present application. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0050] Please refer to Figure 1 , Figure 1 which is the perspective view of the breast pump provided by the embodiment of the present application. As Figure 1 shown, the breast pump 1 includes a milk suction component 10, a milk storage container 20, and a main machine component 30.

[0051] In some implementation manners, the milk suction component 10 is used to fit against the user's breast and suck milk from the user's breast. The milk suction component 10 includes a flared flange for fitting against the breast and a nipple receiving portion for receiving the nipple.

[0052] In some embodiments, the milk storage assembly 20 is configured to receive and store breast milk collected by the breast milk pumping assembly 10, and the milk storage assembly 20 is in communication with the breast milk pumping assembly 10.

[0053] Optionally, the milk storage assembly 20 may include forms such as a milk lid, a milk bowl, a milk bottle, etc., and the present application does not limit it.

[0054] Please refer to Figure 2 , Figure 2 which is a first cross-sectional view of a breast milk pump provided by an embodiment of the present application. As Figure 2 shown, the main body assembly 30 includes: a negative pressure mechanism 31 and a housing 32.

[0055] In some embodiments, the negative pressure mechanism 31 is configured to directly or indirectly apply negative pressure to the breast milk pumping assembly 10 to pump breast milk into the milk storage assembly 20.

[0056] Optionally, the negative pressure mechanism 31 includes, but is not limited to, a piezoelectric pump, a diaphragm pump, a hydraulic pump, a mechanical pump, etc.

[0057] Optionally, the negative pressure mechanism 31 may be directly connected to the breast milk pumping assembly 10 to cause negative pressure inside the breast milk pumping assembly 10; or it may transfer negative pressure to a liquid barrier such as a diaphragm or an airbag to indirectly cause negative pressure inside the breast milk pumping assembly 10.

[0058] In some embodiments, at least a part of the negative pressure mechanism 31 is disposed inside the housing 32, and the housing 32 may further include components such as an energy supply module, a negative pressure air path, a control circuit board, a solenoid valve, etc.

[0059] Optionally, the energy supply module is configured to supply energy to the negative pressure mechanism 31 to support the operation of the negative pressure mechanism 31.

[0060] Please refer to Figure 2 , Figure 2 wherein the milk storage assembly 20 includes a milk storage container 21 for storing milk and a cover body 22 connected to the milk storage container. The cover body 22 is provided with an air path communicating with the atmosphere, and the milk storage container 21 is in communication with the atmosphere through the air path.

[0061] Exemplarily, when the gas leaves from the cover body 22, it can enter the atmosphere through the assembly gap between the breast milk shield 10 and the milk storage assembly 20, and / or the assembly gap between the milk storage assembly 20 and the main body assembly 30.

[0062] Exemplarily, when the gas leaves from the cover body 22, it can enter the atmosphere through a specially provided exhaust channel (not shown in the figure) or an exhaust hole (not shown in the figure).

[0063] It can be understood that the present application does not limit the manner in which the gas communicates with the atmosphere after leaving from the cover body 22.

[0064] Please refer to again Figure 2 , Figure 2 The milk storage component 20 further includes an air path component 23 connected to the cover body 22 and the milk storage container 21.

[0065] Wherein, the air path component 23 opens the air path with the negative pressure mechanism 31 applying negative pressure; the air path component 23 closes the air path with the negative pressure mechanism 31 stopping applying negative pressure.

[0066] Specifically, when the negative pressure mechanism 31 applies negative pressure, it will apply pressure to the air path component 23, causing the air path component 23 to deform from the initial state to open the air path; when the negative pressure mechanism 31 stops applying negative pressure, it will stop applying pressure to the air path component 23, causing the air path component 23 to return to the initial state to close the air path.

[0067] It can be understood that during the process of breast milk continuously entering the milk storage container 21, the air pressure in the milk storage container 21 continuously increases. Therefore, it is necessary to balance the air pressure in the milk storage container 21, otherwise breast milk will not be able to flow into the milk storage container 21. The above structure opens the air path when the negative pressure mechanism 31 applies negative pressure, that is, during the milk suction operation, so that the air pressure in the milk storage container 21 can be restored to the atmospheric pressure during the milk suction operation. Thus, when the negative pressure mechanism 31 stops applying negative pressure, that is, when the milk suction ends, the breast milk can smoothly flow from the milk suction component 10 into the milk storage container 21.

[0068] And in the above structure, the air path component 23 will continuously close the air path when the breast pump is not sucking milk, that is, when the negative pressure mechanism 31 stops applying negative pressure, thereby sealing the milk storage container 21. Therefore, even if the user operates the milk storage container 21 improperly, such as tilting or even inverting the milk storage container 21, at this time the breast milk will not overflow from the milk storage container 21, greatly reducing the probability of breast milk overflowing from the milk storage container 21, having good sealing performance, and not only can prevent milk overflow when gas is discharged, but also can prevent milk overflow when the user operates the milk storage container 21 improperly.

[0069] Optionally, the air path component 23 includes an elastic one-way valve, and the one-way valve closes the valve and opens the air path with the negative pressure mechanism 31 applying negative pressure; the one-way valve opens the valve and closes the air path with the negative pressure mechanism 31 stopping applying negative pressure.

[0070] Wherein, the valve of the one-way valve closing with the negative pressure mechanism 31 applying negative pressure can prevent the breast milk in the milk storage container 21 from being sucked out to the milk suction component 10 by negative pressure, and at this time the air path is open, balancing the air pressure in the milk storage container 21 when the breast pump sucks milk; the valve of the one-way valve opens and closes the air path with the negative pressure mechanism 31 stopping applying negative pressure, and the breast milk sucked out from the milk suction component 10 smoothly flows into the milk storage container 21.

[0071] Moreover, the present application utilizes the one-way valve that most breast pumps have, enabling the one-way valve to not only function as a valve but also close and open the air passage with the operation of the negative pressure mechanism, achieving a better anti-leakage function with a relatively small structural change.

[0072] Please refer to Figures 3 to 4 , Figure 3 which is a schematic structural view of a cover body provided by an embodiment of the present application; Figure 4 is Figure 3 the cross-sectional view taken along line B-B in Figure 3 and Figure 4 As shown in

[0073] the inner wall 223 located at the edge of the through hole is the side wall of the first limiting portion 222.

[0074] In some embodiments, the first limiting portion 222 further includes a first end face 2221 and a second end face 2222 close to the milk suction assembly.

[0075] An air passage component 23 can be arranged in the through hole 221, such as an elastic one-way valve.

[0076] Please refer to Figures 4 to 5 , Figure 5 is Figure 2 the enlarged view at position A in Figure 5 As shown in Figure 5 in

[0077] the air passage component 23 contracts with the negative pressure applied by the negative pressure mechanism 31. When contracting, a first gap 24 is formed between the air passage component 23 and the inner wall 223 at the edge of the through hole, and the milk storage container 21 communicates with the atmosphere through the first gap 24.

[0078] The air passage component 23 expands when the negative pressure mechanism 31 stops applying negative pressure. When expanding, the air passage component 23 seals the through hole 221 to close the air passage.

[0079] Please refer to Figures 4 to 7 again, Figure 6 which is the front view of the air passage component provided by an embodiment of the present application, Figure 7 and Figures 4 to 7As shown, the cover body 22 includes a first limiting portion 222 surrounding the through hole 221. The first limiting portion 222 includes a first end face 2221 close to the milk sucking assembly 10. The air path assembly 23 includes a second limiting portion 231.

[0080] At least one exhaust passage 233 communicating with the first gap 24 is provided between the second limiting portion 231 and the first limiting portion 222. The air path assembly 23 contracts as the negative pressure mechanism applies negative pressure, and the milk storage container 21 communicates with the atmosphere through the first gap 24 and the exhaust passage 233.

[0081] In some embodiments, the air path assembly 23 further includes a third limiting portion 232, and the first limiting portion 222 is located between the second limiting portion 231 and the third limiting portion 232.

[0082] The second limiting portion 231 and the third limiting portion 232 can facilitate the installation of the air path assembly 23 in the through hole and fix the position of the air path assembly 23 after installation, preventing the air path assembly from shifting due to the shaking of the breast pump.

[0083] Further, in the above setting, when the third limiting portion 232 contracts due to the negative pressure applied by the negative pressure mechanism 31, the area of the third limiting portion 232 needs to be reduced to be smaller than the area of the through hole 221 to prevent blocking the first gap 24.

[0084] In some embodiments, the first limiting portion 222 further includes a second end face 2222 close to the milk storage container 21. To prevent the third limiting portion 232 from blocking the first gap 24, at least one pressure relief passage 234 communicating with the first gap 24 is provided between the third limiting portion 232 and the second end face 2222 of the first limiting portion 222.

[0085] The air path assembly 24 contracts as the negative pressure mechanism 31 applies negative pressure, and the milk storage container 21 communicates with the atmosphere through the pressure relief passage 234, the first gap 24, and the exhaust passage 233.

[0086] Through the above structure, the air path assembly 23 opens and closes the air path as the negative pressure mechanism 21 applies and stops applying negative pressure.

[0087] Optionally, the exhaust passage 233 and the pressure relief passage 234 are oppositely arranged.

[0088] Specifically, the opposite arrangement of the exhaust passage 233 and the pressure relief passage 234 can improve the exhaust efficiency, enabling the air pressure in the milk storage container 21 to balance to the atmospheric pressure faster.

[0089] Please refer to again Figure 5 、Figure 6 and Figure 7 In some embodiments, the exhaust passage 233 is an exhaust groove provided on the end face of the second limiting portion 231 close to the first limiting portion 222, or the exhaust passage 233 is an exhaust groove provided on the first end face 2221 of the first limiting portion 222, where the first end face 2221 can also be understood as the end face in the first limiting portion 222 close to the second limiting portion 231.

[0090] It can be understood that Figures 5 to 7 in, taking the exhaust passage 233 as an exhaust groove provided on the end face of the second limiting portion 231 close to the first limiting portion 222 as an example for illustration, but the exhaust passage 233 can also be provided on the first end face 2221 of the first limiting portion 222, and the two can achieve substantially the same effect; or, pressure relief grooves can be provided in both the second limiting portion 231 and the first limiting portion 222.

[0091] Wherein, when the exhaust groove is provided on the end face of the second limiting portion 231 close to the first limiting portion 222, the exhaust groove is recessed away from the first limiting portion 222; when the exhaust groove is provided on the first end face 2221 of the first limiting portion 222, the exhaust groove is recessed away from the second limiting portion 231.

[0092] Optionally, the present application does not limit the width, length and depth of the exhaust groove, as long as the gas can flow smoothly in the gas path.

[0093] Furthermore, the exhaust passage 233 is not limited to the above form, and the exhaust passage 233 can be the same as Figures 7 to 8 the setting manner of the pressure relief passage 234 in, and is provided to be recessed in the direction of the through hole 221.

[0094] Please refer to Figure 5 、 Figure 6 and Figure 7 again, in some embodiments, the pressure relief passage 234 is a pressure relief groove provided on the third limiting portion 232 and recessed in the direction of the through hole 221.

[0095] In some embodiments, being recessed in the direction of the through hole 221 means being recessed towards the center of the through hole 221.

[0096] Furthermore, the pressure relief passage 234 is not limited to the above form, and the pressure relief passage 234 can be the same as Figures 7 to 8The exhaust passage 233 is arranged in the same way. For example, the pressure relief passage 234 is a pressure relief groove provided on the end face of the third limiting portion 232 close to the first limiting portion 222, and the pressure relief groove is recessed away from the first limiting portion 222. Another example is that the pressure relief passage 234 is a pressure relief groove provided on the second end face 2222 of the first limiting portion 222, and the pressure relief groove is recessed away from the third limiting portion 232. Or, pressure relief grooves can be provided in both the third limiting portion 232 and the first limiting portion 222 at the same time.

[0097] By providing the exhaust passage 233 and the pressure relief passage 234, when the gas path of the gas path assembly 23 is opened, the gas can smoothly pass through the gas path.

[0098] Please refer to Figure 8 and Figure 9 , Figure 8 is the second cross-sectional view of the breast pump provided by the embodiment of the present application; Figure 9 is Figure 8 the enlarged view of the C position in

[0099] As Figure 8 and Figure 9 shown, in some embodiments, the breast milk sucking assembly 10 is detachably connected to the cover body 22, and a second gap 25 communicating with the atmosphere is provided between the cover body 22 and the breast milk sucking assembly 10, and the second gap 25 communicates with the exhaust passage 233.

[0100] It can be understood that the space where the cover body 22 is not hermetically connected to the breast milk sucking assembly 10 belongs to the second gap 25, and the second gap 25 can be in the form of holes, grooves, channels, slits, etc., which are not limited in the present application.

[0101] Please refer to Figures 8 to 9 , in some embodiments, the cover body 22 includes an outer side wall 225 connected to the milk storage container 21, a bottom wall 224 connected to the outer side wall 225, and a first limiting portion 222 connected to the bottom wall 224; the gas path assembly 23 includes a first connecting member 235; the breast milk sucking assembly 10 includes a second connecting member 11 hermetically connected to the first connecting member 235.

[0102] In some embodiments, the first connecting member 235 extends away from the milk storage container 21; the second connecting member 11 extends towards the milk storage container 21.

[0103] In some embodiments, the breast milk sucking assembly 10 further includes a connecting plate 12 connected to the second connecting member 11 and forming the second gap 25 with the outer side wall 225.

[0104] Among them, the second gap 25 communicates with the exhaust passage 233, and the gas can flow from the exhaust passage 233 to the second gap 25.

[0105] Specifically, Figure 9 in the air circuit component 23, the air circuit is opened, and the path of the air circuit is indicated by a dotted line. Figure 9 The gas in the milk storage container 21 sequentially passes through the pressure relief passage 234 in the third limiting portion 232, the first gap 24 between the air pressure control component 23 and the first limiting portion 222, the exhaust passage 233 in the second limiting portion 231, and the second gap 25 and then flows into the atmosphere, thereby balancing the air pressure in the milk storage container 21.

[0106] Please refer to again Figure 10 and Figure 11 , Figure 10 which is the third cross-sectional view of a breast pump provided by an embodiment of the present application. Figure 11 It is Figure 10 the enlarged view at D in Figures 10 to 11 . As shown in

[0107] , the cover body 22 is provided with an air hole 26 communicating the milk storage container 21 and the atmosphere.

[0108] Optionally, one or more air holes 26 may be provided, and the present application does not make any limitation.

[0109] Further, the air pressure control component may also be an elastic member provided in the air hole 26. At this time, the milk suction component 10 is communicated with the air hole 26, so that the negative pressure applied by the negative pressure mechanism 31 can be transmitted to the elastic member in the air hole 26.

[0110] Please refer to again Figure 12 , Figure 12 which is the explosion diagram provided by an embodiment of the present application. As shown in Figure 12 , Figure 12 the breast pump in

[0111] includes a milk suction component 10, an air pressure control component 23, a cover body 22, and a milk storage container 21.

[0112] In some embodiments, the cover body 22 is detachably connected to the milk storage container 21.

[0113] In some embodiments, the cover body 22 is detachably connected to the air pressure control component 23.

[0114] In summary, the present application provides a breast pump, which includes a milk suction component, a milk storage component, and a negative pressure mechanism; the milk suction component fits against the user's breast and is used to suck milk from the user's breast; the milk storage component is communicated with the milk suction component and is used to receive and store the milk sucked out from the milk suction component; the negative pressure mechanism is used to directly or indirectly apply negative pressure to the milk suction component; the milk storage component includes a milk storage container for storing milk and a cover body connected to the milk storage container; the cover body is provided with an air passage communicating with the atmosphere, and the milk storage container is communicated with the atmosphere through the air passage. By communicating the milk storage container with the atmosphere through the air passage in the cover body, the present application can prevent breast milk from being carried out when gas is discharged, so that the breast pump has a better anti-overflow effect.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A breast pump, comprising: Breast pump assembly, milk storage assembly and negative pressure mechanism; The breast pump assembly fits the user's breast and is used to extract milk from the user's breast; The milk storage component is in communication with the breast pump component and is used to receive and store milk sucked from the breast pump component; The negative pressure mechanism is used to directly or indirectly apply negative pressure to the breast pump assembly; Characterized in that the milk storage assembly comprises a milk storage container for storing milk and a cover connected to the milk storage container; The cover body is provided with an air path connected to the atmosphere, and the milk storage container is connected to the atmosphere through the air path.

2. The breast pump according to claim 1, characterized in that: The milk storage assembly further comprises an air path assembly connected to the cover body and the milk storage container; The gas path component opens the gas path when the negative pressure mechanism applies negative pressure; The air circuit assembly closes the air circuit when the negative pressure mechanism stops applying negative pressure.

3. The breast pump according to claim 2, characterized in that: The cover body comprises a through hole communicating with the milk storage container, and the air path assembly is arranged in the through hole of the cover body; The air path component contracts as the negative pressure mechanism applies negative pressure, and a first gap is formed between the air path component and the inner wall of the edge of the through hole during contraction, and the milk storage container is connected to the atmosphere through the first gap; The air path component expands as the negative pressure mechanism stops applying negative pressure. When expanding, the air path component seals the through hole and closes the air path.

4. The breast pump according to claim 3, characterized in that: The cover body comprises a first limiting portion surrounding the through hole, the first limiting portion comprises a first end surface close to the breast pumping assembly, and the air path assembly comprises a second limiting portion; At least one exhaust passage communicating with the first gap is provided between the second limiting portion and the first end surface of the first limiting portion; The air path component contracts as the negative pressure mechanism applies negative pressure, and the milk storage container is connected to the atmosphere through the first gap and the exhaust channel.

5. The breast pump according to claim 4, characterized in that: The gas path assembly further includes a third limiting portion, and the first limiting portion is located between the second limiting portion and the third limiting portion.

6. The breast pump according to claim 5, characterized in that The first limiting portion further includes a second end surface close to the milk storage container, and at least one pressure relief channel communicating with the first gap is provided between the third limiting portion and the second end surface of the first limiting portion; The air path component contracts as the negative pressure mechanism applies negative pressure, and the milk storage container is connected to the atmosphere through the pressure relief channel, the first gap, and the exhaust channel.

7. The breast pump according to claim 6, characterized in that The exhaust channel and the pressure relief channel are arranged opposite to each other.

8. The breast pump according to claim 6, characterized in that: The pressure relief channel is a pressure relief groove provided on the third limiting portion and recessed toward the through hole.

9. The breast pump according to claim 4, characterized in that: The exhaust passage is an exhaust groove provided on an end surface of the second limiting portion close to the first limiting portion, or the exhaust passage is an exhaust groove provided on a first end surface of the first limiting portion.

10. The breast pump according to claim 4, characterized in that: The breast pumping assembly is detachably connected to the cover body, and a second gap communicating with the atmosphere is provided between the cover body and the breast pumping assembly, and the second gap is communicated with the exhaust passage.

11. The breast pump according to claim 10, characterized in that The cover body includes an outer wall connected to the milk storage container, a bottom wall connected to the outer wall, and the first limiting portion connected to the bottom wall; the air path assembly includes a first connecting piece; and the milk suction assembly includes a second connecting piece sealed to the first connecting piece.

12. The breast pump according to any one of claims 2 to 11, characterized in that: The gas circuit assembly includes a one-way valve with elasticity; The one-way valve closes and opens the gas path when the negative pressure mechanism applies negative pressure; The one-way valve opens and closes the gas path when the negative pressure mechanism stops applying the negative pressure.

13. The breast pump according to claim 1, characterized in that The cover body is provided with an air hole communicating with the milk storage container and the atmosphere.

14. The breast pump according to claim 1, characterized in that The cover body is detachably connected to the milk storage container.

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