Breast pump

Abstract

Disclosed in the present application is a breast pump. The breast pump comprises at least one breast shield, a buffer isolation member, and a main unit. An air inlet of a buffer cavity in the interior of the buffer isolation member is in communication with a milk suction channel of the breast shield. A negative pressure pump assembly is arranged in the main unit. The negative pressure pump is in communication with an air outlet of the buffer cavity, and milk flowing back can be collected in the buffer cavity. The breast pump, by means of the buffer isolation member and the negative pressure assembly, achieves effective isolation between milk and the main unit, improving the hygiene and use convenience of the device.

Description

breast pump

[0001] Related applications

[0002] This application claims priority to Chinese patent applications filed on March 29, 2024 with application number 202410375322.8 and on March 27, 2025 with application number 202520566607.X, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of maternal and infant care equipment, and in particular to a breast pump with a backflow milk isolation function. Background Art

[0004] A breast pump is a tool used to suck out breast milk accumulated in the mammary glands. It achieves internal air pressure changes through an internal vacuum negative pressure air pump, that is, a cyclic "intake" and "exhaust" operation to imitate the action of a baby sucking breast milk and achieve the purpose of sucking milk.

[0005] Existing breast pumps are equipped with a buffer isolator, which has a reflux groove inside. The reflux groove is located between the air duct and the air inlet of the air pump and can be used to accommodate refluxed milk to prevent it from flowing back into the main unit. However, the existing buffer isolator is non-detachably connected to the main unit housing of the breast pump. When it is necessary to drain the milk stored in the reflux groove, one method is to open the cover of the buffer isolator and tilt the entire main unit housing to pour it out, or to set a drainage hole in the reflux groove and use a sealing plug to drain the milk. Both methods are inconvenient for draining milk and are also very troublesome for cleaning the inside of the buffer isolator, resulting in problems such as difficulty in draining and cleaning. Removable buffer isolators must ensure airtightness after installation. Summary of the Invention

[0006] The main purpose of this application is to propose a breast pump, which aims to provide a breast pump with a backflow milk isolation function, facilitate the discharge and cleaning of the buffer isolation part, improve the convenience of using the buffer isolation part, and effectively ensure the air tightness after installation.

[0007] To achieve the above objectives, the breast pump proposed in this application includes:

[0008] A breast shield, the breast shield including a milk extraction channel;

[0009] a host, the host comprising a negative pressure assembly for providing negative pressure to the breast shield;

[0010] a buffer isolator, the buffer isolator being detachably connected to the main unit, a buffer cavity being formed therein, an air intake port and an air outlet being formed on the groove wall of the buffer cavity, the air intake port being in communication with the milk suction channel, the air outlet being in communication with the negative pressure assembly, and the buffer cavity being used to accommodate refluxed milk; and

[0011] A detection device is provided in the host, and is used to detect whether the buffer isolation member is installed in place.

[0012] In one embodiment, the breast pump further comprises a controller, wherein the controller is configured to stop the negative pressure assembly from operating when detecting that the buffer isolation member is not installed in place.

[0013] In one embodiment, the breast pump further comprises a controller, and the controller is configured to provide a prompt device when detecting whether the buffer isolation member is properly installed or not.

[0014] In one embodiment, the detection device includes at least one of a pressure sensor and a photoelectric sensor.

[0015] In one embodiment, the pressure sensor is mounted on a mounting surface of the buffer cavity on the host.

[0016] In one embodiment, the breast pump further comprises a liquid sensor, which is disposed in the buffer cavity. The sensor is used to detect whether there is milk flowing back into the buffer cavity or to detect the amount of milk in the buffer cavity.

[0017] In one embodiment, the host has a receiving groove, and the buffer isolation member is installed in the receiving groove. One of the outer wall of the buffer isolation member and the bottom wall of the receiving groove is convexly provided with a snap, and the other is concavely provided with a limiting groove. The buffer isolation member and the groove wall of the receiving groove are limited by the snap and inserted into the limiting groove to fit with the snap.

[0018] In one embodiment, the number of the clips and the number of the limiting grooves are both two, one of the two clips or the two limiting grooves is arranged on opposite sides of the connecting hole, and the other is arranged on opposite sides of the outer wall of the buffer isolation member, and one clip is correspondingly limited and inserted into one limiting groove.

[0019] In one embodiment, the breast pump further comprises a milk storage container, wherein the milk storage container and the breast shield enclose a milk storage cavity for collecting milk flowing into the milk suction channel, and the milk suction channel is located in the milk storage cavity.

[0020] In one embodiment, the main unit is installed on the milk storage container, and the milk storage container is provided with an air path connecting the milk suction channel and the air suction port.

[0021] To achieve the above objectives, the present application also proposes a breast pump, comprising:

[0022] A breast shield, the breast shield including a milk extraction channel;

[0023] a host, the host comprising a negative pressure pump assembly for providing negative pressure to the breast shield;

[0024] A buffer isolator is detachably connected to the main unit, a buffer cavity is formed in the buffer isolator, an air inlet and an air outlet are provided on the cavity wall of the buffer cavity, the air inlet is communicated with the milk suction channel, the air outlet is communicated with the negative pressure pump assembly, and the buffer cavity is used to accommodate refluxed milk.

[0025] In one embodiment, the host includes a detection device, which is disposed inside the host and is used to detect whether the buffer isolation member is installed in place.

[0026] In one embodiment, the breast pump further comprises a controller, wherein the controller is configured to stop the negative pressure pump assembly from operating when detecting that the buffer isolation member is not installed in place.

[0027] In one embodiment, the breast pump further comprises a controller, and the controller is configured to provide a prompt device when detecting whether the buffer isolation member is properly installed or not.

[0028] In one embodiment, the detection device includes at least one of a pressure sensor and a photoelectric sensor.

[0029] In one embodiment, the pressure sensor is mounted on a mounting surface of the buffer cavity on the host.

[0030] In one embodiment, the breast pump further comprises a liquid sensor, which is disposed in the buffer cavity. The sensor is used to detect whether there is milk flowing back into the buffer cavity or to detect the amount of milk in the buffer cavity.

[0031] In one embodiment, one of the outer wall of the buffer isolator and the bottom wall of the accommodating groove is convexly provided with a snap fastener, and the other is concavely provided with a limiting groove, and the buffer isolator and the groove wall of the accommodating groove are limited by the snap fastener and inserted into the limiting groove to fit together.

[0032] In one embodiment, the number of the clips and the number of the limiting grooves are both two, one of the two clips or the two limiting grooves is arranged on opposite sides of the connecting hole, and the other is arranged on opposite sides of the outer wall of the buffer isolation member, and one clip is correspondingly limited and inserted into one limiting groove.

[0033] In one embodiment, the breast pump further comprises a milk storage container, wherein the milk storage container and the breast shield enclose a milk storage cavity for collecting milk flowing into the milk suction channel, and the milk suction channel is located in the milk storage cavity.

[0034] In one embodiment, the main unit is installed on the milk storage container, and the milk storage container is provided with an air path connecting the milk suction channel and the air inlet.

[0035] The present application also proposes a breast pump, comprising:

[0036] at least one breast shield, the breast shield being provided with a milk extraction channel;

[0037] a host comprising a negative pressure pump assembly for providing negative pressure to the breast shield;

[0038] a buffer isolator, wherein a buffer cavity is formed inside the buffer isolator, the buffer isolator has an air inlet and an air outlet communicating with the buffer cavity, the air inlet of the buffer cavity is communicated with the milk suction channel, and the air outlet of the buffer cavity is communicated with the negative pressure pump assembly; and

[0039] A detection member is installed on the buffer isolation member and is used to detect whether there is liquid in the buffer cavity.

[0040] In one embodiment, the detection element includes a capacitor sheet or a liquid sensor, which is electrically connected to the control circuit of the host. When liquid seeps into the buffer cavity, the detection element prompts the user, triggers an alarm, or triggers the host to shut down the negative pressure pump assembly.

[0041] In one embodiment, the detection member is disposed on the inner wall of the buffer cavity, the outer wall of the buffer cavity, or at a position of the buffer cavity close to the air inlet and the air outlet, and the detection member is used to detect whether liquid has seeped into the buffer cavity.

[0042] In one embodiment, the breast pump further comprises a liquid storage element, which is disposed in the buffer cavity or in a position of the buffer cavity close to the air inlet and the air outlet to absorb or store the liquid entering the buffer cavity.

[0043] In one embodiment, the buffer isolation member includes a box body and a cover plate, the box body is connected to the host, and the cover plate is detachably mounted on the host and encloses the box body to form the buffer cavity.

[0044] In one embodiment, the liquid storage element is detachably disposed in the buffer cavity;

[0045] And / or, the cover is connected to the host by snapping, rotating or magnetic attraction.

[0046] In one embodiment, the buffer chamber includes a first chamber and a second chamber that are connected to each other, the volume of the first chamber is larger than the volume of the second chamber, and the liquid storage element is placed in the first chamber and adapted to the first chamber.

[0047] In one embodiment, the liquid storage element is any one of a sponge, absorbent cotton, a fiber pad, or liquid-absorbing particles, so as to absorb and prevent liquid from entering the host.

[0048] In one embodiment, the volume of the buffer chamber is L, 1 ml≤L≤10 ml.

[0049] In one embodiment, the breast pump further comprises a hose, with two ends of the hose respectively connected to the air inlet and the milk suction channel.

[0050] The present application also proposes a breast pump, comprising:

[0051] at least one breast shield including a milk extraction channel;

[0052] a host comprising a negative pressure pump assembly for providing negative pressure to the breast shield;

[0053] A buffer isolator is provided on the main unit to achieve fluid isolation and convenient disassembly and assembly of the buffer isolator. A buffer cavity is formed in the buffer isolator. The buffer cavity is provided with an air inlet and an air outlet. The air inlet is directly or indirectly connected to the milk suction channel, and the air outlet is connected to the negative pressure pump assembly. The buffer cavity is used to accommodate refluxed milk.

[0054] In one embodiment, the buffer isolation member is detachably connected to the host.

[0055] In one embodiment, the breast pump further comprises a detection device, which is disposed in the main unit and is used to detect whether the buffer isolation member is properly installed.

[0056] In one embodiment, the host further includes a controller, and the controller is configured to stop the operation of the negative pressure pump assembly when it is detected that the buffer isolation member is not installed in place.

[0057] In one embodiment, the host further includes a controller, and the controller is used to provide a prompt device when detecting whether the buffer isolation member is installed in place or not.

[0058] In one embodiment, the detection device includes at least one of a pressure sensor and a photoelectric sensor.

[0059] In one embodiment, the pressure sensor is installed in the buffer cavity.

[0060] In one embodiment, the breast pump further comprises a liquid sensor, which is disposed in the buffer cavity. The sensor is used to detect whether there is milk flowing back into the buffer cavity or to detect the amount of milk in the buffer cavity.

[0061] In one embodiment, the host has a receiving slot, and the buffer isolation member is installed in the receiving slot;

[0062] One of the outer wall of the buffer isolator and the accommodating groove is convexly provided with a buckle, and the other is concavely provided with a limiting groove. The buffer isolator and the accommodating groove are limited by the buckle and inserted into the limiting groove to fit together.

[0063] In one embodiment, the number of the clips and the number of the limiting grooves are both two, one of the two clips or the two limiting grooves is arranged on opposite sides of the connecting hole, and the other is arranged on opposite sides of the outer wall of the buffer isolation member, and one clip is correspondingly limited and inserted into one limiting groove.

[0064] In one embodiment, the breast pump further comprises the milk storage container, wherein the milk storage container (40) and the breast shield enclose a milk storage cavity for collecting milk flowing into the milk suction channel, and the milk suction channel is located in the milk storage cavity.

[0065] In one embodiment, the host is connected to the milk storage container, and the milk storage container is provided with an air path connecting the milk suction channel and the air inlet.

[0066] The present application also proposes a breast pump, comprising:

[0067] at least one breast shield, the breast shield being provided with a milk extraction channel;

[0068] a host comprising a negative pressure pump assembly for providing negative pressure to the breast shield;

[0069] a buffer isolator, wherein a buffer cavity is formed therein, the buffer isolator having an air inlet and an air outlet communicating with the buffer cavity, the air inlet of the buffer cavity being directly or indirectly communicated with the milk suction channel, and the air outlet of the buffer cavity being communicated with the negative pressure pump assembly; and

[0070] A detection member is installed on the buffer isolation member and is used to detect whether there is liquid in the buffer cavity.

[0071] In one embodiment, an elastic diaphragm is provided between the air inlet of the buffer cavity and the milk suction channel.

[0072] In one embodiment, the detection element is a liquid sensor, the host includes a control circuit, and the liquid sensor is electrically connected to the control circuit.

[0073] In one embodiment, the liquid sensor is at least one of a capacitor, a humidity sensor, a spring, or an infrared sensor.

[0074] In one embodiment, the liquid sensor prompts the user, triggers an alarm, or triggers the host to shut down the negative pressure pump assembly when liquid seeps into the buffer chamber.

[0075] In one embodiment, the detection member is arranged inside the buffer cavity, at least at one location on the outer wall of the buffer cavity, or at least at one location in the buffer cavity close to the air inlet and the air outlet, and the detection member is used to detect whether liquid has seeped into the buffer cavity.

[0076] In one embodiment, the breast pump further comprises a liquid storage element, which is disposed in the buffer cavity or in a position of the buffer cavity close to the air inlet and the air outlet to absorb or store the liquid entering the buffer cavity.

[0077] In one embodiment, the buffer isolation member includes a box body and a cover plate, the box body is connected to the host, and the cover plate is installed on the host and encloses the box body to form the buffer cavity.

[0078] In one embodiment, the liquid storage element is detachably disposed in the buffer cavity;

[0079] And / or, the cover is snap-connected, screw-connected, magnetically connected or fixed to the host.

[0080] In one embodiment, the buffer chamber includes a first chamber and a second chamber that are connected to each other, the volume of the first chamber is larger than the volume of the second chamber, and the liquid storage element is placed in the first chamber and adapted to the first chamber.

[0081] In one embodiment, the liquid storage element is any one of a sponge, absorbent cotton, a fiber pad, a porous graphene material, or liquid-absorbing particles, so as to absorb and prevent liquid from entering the host.

[0082] In one embodiment, the volume of the buffer chamber is L, 1 ml≤L≤10 ml.

[0083] In one embodiment, the breast pump further comprises a hose, with two ends of the hose respectively connected to the air inlet and the milk suction channel.

[0084] The technical solution of the present application is to arrange the buffer isolation piece and the receiving groove formed by the outer peripheral wall of the breast shield in a detachable connection manner, so that the buffer isolation piece can be freely installed and removed from the breast shield. After installation, the air inlet of the buffer cavity inside the buffer isolation piece is connected to the milk suction channel of the breast shield, and the negative pressure pump assembly is arranged in the receiving groove, and the negative pressure pump assembly is connected to the air outlet of the buffer cavity through an air duct. During milk extraction, the negative pressure pump assembly is operated to generate negative pressure in the milk extraction channel, thereby allowing the suction force generated by the milk extraction channel to extract milk from the breast and store the milk in the milk storage container. Since the negative pressure pump assembly is connected to the buffer chamber, it is not directly connected to the air inlet. This effectively prevents milk from being drawn into the main device through the air duct. If milk flows back into the buffer chamber through the air inlet, the backflowing milk will be collected in the buffer chamber, and the buffer separator serves to isolate the backflowing milk. When the milk collected and stored in the buffer separator needs to be poured out, the buffer separator can be removed from the breast shield for separate emptying, discharge, and cleaning. This not only effectively prevents milk from flowing back into electronic components such as the negative pressure pump assembly, but also allows for quick cleaning of the buffer separator, making operation convenient and improving work efficiency. A detection device is also provided, which is connected to the buffer chamber and can detect whether the buffer separator is properly installed, ensuring the airtightness inside the buffer separator and the negative pressure milk extraction effect of the buffer separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0086] FIG1 is a schematic structural diagram of an embodiment of a breast pump of the present application;

[0087] FIG2 is a schematic structural diagram of the breast pump of the present application from another perspective;

[0088] FIG3 is a schematic structural diagram of the breast pump of the present application in which the breast shield and the buffer isolation member are separated;

[0089] FIG4 is a schematic diagram of the explosion structure of the buffer isolation member in the breast pump of the present application;

[0090] FIG5 is a schematic diagram of the exploded structure of the breast pump of the present application;

[0091] FIG6 is a schematic diagram of the exploded structure of the breast pump of the present application from another perspective;

[0092] FIG7 is a schematic cross-sectional view of the breast pump of the present application;

[0093] FIG8 is a schematic structural diagram of an embodiment of a breast pump provided by the present application;

[0094] FIG9 is a cross-sectional view of the breast pump of FIG8 along line AA;

[0095] FIG10 is a partial enlarged schematic diagram of point B in FIG9 .

[0096] Description of Figure Numbers:

[0097] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0098] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0099] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0100] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0101] The present application proposes a breast pump 1 .

[0102] In the embodiment of the present application, as shown in Figures 1 to 6, the breast pump 1 includes:

[0103] A breast shield 10 including a milk extraction channel 13;

[0104] A host 90 including a negative pressure pump assembly 30 for providing negative pressure to the breast shield 10;

[0105] The buffer isolator 20 is detachably connected to the main unit 90. A buffer chamber 21 is formed in the buffer isolator 20. An air inlet and an air outlet 213 are formed on the wall of the buffer chamber 21. The air inlet communicates with the milk suction channel 13, and the air outlet communicates with the negative pressure pump assembly. The buffer chamber 21 is used to accommodate refluxed milk.

[0106] The detection device is arranged in the host and is used to detect whether the buffer isolation member 20 is installed in place.

[0107] In the above embodiment, the negative pressure pump assembly 30 includes a negative pressure pump 31 and an air duct 33. One end of the air duct 33 is connected to the negative pressure pump 31, and the other end is connected to the air outlet 213 of the buffer chamber 21. When the negative pressure pump 31 is operated, a negative pressure is generated in the milk extraction channel 13, so that the suction force generated by the breast shield connected to the milk extraction channel 13 can extract milk from the breast. Since the negative pressure pump 31 is connected to the buffer chamber 21 through the air duct 33, the air duct 33 is not directly connected to the air inlet. A buffer isolation member 20 is provided between the air duct 33 and the air inlet to intercept and collect milk absorbed during the suction process, thereby effectively preventing milk from being sucked into the host device through the air duct 33. When milk flows back into the buffer chamber 21 through the air inlet, the backflowing milk is collected in the buffer chamber 21. The buffer isolation member 20 serves to isolate the backflowing milk, preventing the backflowing milk from flowing into electronic components such as the negative pressure pump 31 and damaging the electronic components, thereby causing damage to the host device. Therefore, by providing a buffer isolator 20 to isolate and collect the refluxed milk, the buffer isolator 20 is arranged in the shell, which has the advantages of compact structure and simple structure. At the same time, it can effectively prevent milk from flowing back into the electronic components of the host device such as the negative pressure pump 31, thereby improving the safety and effectiveness of the milk pumping process and further ensuring the service life of the host device.

[0108] In some embodiments, the buffer isolation member 20 may be fixedly mounted on the host, while in other embodiments, it may be detachable.

[0109] In one embodiment, the buffer spacer 20 is detachably connected to the receiving groove 11. The detachable connection may be a threaded connection, a snap 25 connection, a pin connection, a key connection, or the like, which is not limited herein. The detachable connection between the buffer spacer 20 and the receiving groove 11 allows the buffer spacer 20 to be removed from the breast shield 10 for independent emptying and cleaning when milk collected and stored within the buffer spacer 20 needs to be drained. This not only effectively prevents milk from flowing back into electronic components such as the vacuum pump 31, but also allows for quick cleaning of the buffer spacer 20, resulting in convenient operation and improved work efficiency.

[0110] In this embodiment, since the buffer isolation piece 20 is detachably connected to the receiving groove 11, a hole needs to be provided in the receiving groove 11 for connecting the buffer isolation piece 20 with the milk suction channel 13. Therefore, a connecting hole 113 is provided on the bottom wall of the receiving groove 11, and the air inlet is connected to the connecting hole 113. The air inlet can suck air into the milk suction channel 13 through the connecting hole 113 to create a negative pressure environment inside the milk suction channel. By operating the negative pressure pump 31 to generate negative pressure in the milk suction channel 13, the suction force generated by the milk suction channel 13 can suck out the milk in the breast, and the milk is stored in the milk storage container 40.

[0111] In this embodiment, the breast pump 1 further includes a detection device for detecting whether the buffer spacer 20 is properly installed. The detection device may be a pressure sensor, an airtightness detector, a vacuum detector, or the like. Specifically, the detection device and the negative pressure pump 31 are both communicatively connected to a controller, which may be located within or outside the host device. After the buffer spacer 20 is installed and the negative pressure pump 31 is turned on, the detection device can detect the air level inside the buffer chamber 21 and transmit the information to the controller in real time. The controller can compare the received data with preset air levels and provide feedback to the user to inform them of the pressure inside the buffer chamber 21 and determine whether the buffer spacer 20 is properly installed. If the air level inside the buffer chamber 21 does not reach the preset value, it can be determined that the buffer spacer 20 is not properly installed. The user can then turn off the negative pressure pump 31 and reinstall it on their own. If the air level inside the buffer chamber 21 reaches the preset value, it can be determined that the buffer spacer 20 is properly installed. The negative pressure pump 31 can be turned on again to complete the milk extraction operation.

[0112] The technical solution of the present application is to arrange the buffer isolation member 20 and the receiving groove 11 formed on the outer peripheral wall of the breast shield 10 in a detachable connection manner, so that the buffer isolation member 20 can be freely installed and removed from the breast shield 10. After installation, the air inlet of the buffer cavity 21 inside the buffer isolation member 20 is connected to the milk suction channel 13 of the breast shield 10, and the negative pressure pump assembly 30 is arranged in the receiving groove 11, and the negative pressure pump assembly 30 is connected to the air outlet 213 of the buffer cavity 21 through the air guide tube 33. During the process of sucking milk, the negative pressure pump assembly 30 is operated to generate negative pressure in the milk suction channel 13 so that the suction force generated by the milk suction channel 13 sucks the milk in the breast and stores the milk in the milk storage container 40. Since the negative pressure pump assembly 30 is connected to the buffer chamber 21 through the air duct 33, the air duct 33 is not directly connected to the air inlet, which can effectively prevent the milk from being sucked into the host device through the air duct 33. When the milk flows back to the buffer chamber 21 through the air inlet, the refluxed milk will be collected in the buffer chamber 21, and the buffer isolation member 20 plays an isolating role. The function of reflux milk: when the milk collected and stored in the buffer isolation member 20 needs to be poured out, the buffer isolation member 20 can be removed from the breast shield 10 for separate pouring, discharge and cleaning, which can not only effectively prevent the milk from flowing back into the electronic components such as the negative pressure pump assembly 30, but also quickly clean the buffer isolation member 20, which is convenient to operate and improves work efficiency. In addition, a detection device is provided, which is connected to the buffer chamber 21 and can detect whether the buffer isolation member 20 is installed in place, thereby ensuring the internal air tightness of the buffer isolation member 20 and the negative pressure milk suction effect of the buffer isolation member 20.

[0113] In an embodiment of the present application, the breast pump further comprises a controller, which is configured to stop the operation of the negative pressure pump assembly when it is detected that the buffer isolation member 20 is not installed in place.

[0114] In one embodiment, the detection device and the negative pressure pump assembly 30 are both in communication with a controller, which can be located inside or outside the host device. After the buffer isolation member 20 is installed, the controller can be controlled to turn on the negative pressure pump assembly 30. The detection device can detect the pressure value inside the buffer chamber 21 and transmit it to the controller in real time. The controller can compare the received data with the preset pressure data and feedback the comparison results to the user to determine whether the buffer isolation member 20 is properly installed. If the pressure value inside the buffer chamber 21 does not reach the preset value, the controller controls the negative pressure pump assembly 30 to be turned off.

[0115] In one embodiment of the present application, the breast pump further comprises a controller, which is used to provide a prompt device when detecting whether the buffer isolation member 20 is installed in place or not.

[0116] In this embodiment, the detection device and the negative pressure pump assembly 30 are both connected to the controller for communication, and also include a prompting device, which can be a prompting light, or a sound device such as a speaker, an audio light, or a display screen, etc. The prompting device is connected to the controller for communication. After the buffer isolation member 20 is installed, the controller can be controlled to turn on the negative pressure pump assembly 30, and the detection device can detect the pressure value inside the buffer chamber 21 and transmit it to the controller in real time. The controller can compare the received data with the preset pressure data. If the comparison result shows that the pressure value does not meet the standard, that is, it is judged that the buffer isolation member 20 is not installed in place, the controller controls the prompting device to open to achieve a reminder effect for the user. Alternatively, the prompting device can be in a continuously open state and have two display states, i.e., lights of different colors, different display lights, etc., which can also achieve a reminder effect for the user.

[0117] In one embodiment of the present application, the detection device includes at least one of a pressure sensor 60 and a photoelectric sensor.

[0118] In this embodiment, the breast pump 1 further includes a detection device for detecting whether the buffer isolation member 20 is properly installed. The detection device may be a pressure sensor, a photoelectric sensor, an airtightness detector, a vacuum detector, or the like. Furthermore, the detection device may be at least one of the pressure sensor 60 and the photoelectric sensor, i.e., the detection device may be a pressure sensor or a photoelectric sensor, or may be a combination of a pressure sensor and a photoelectric sensor. After the buffer isolation member 20 is installed, the controller may be controlled to turn on the negative pressure pump assembly 30 and the detection device. The detection device may detect the pressure value, optical signal, electrical signal, etc., inside the buffer chamber 21. The controller compares the received data with the preset data. If the pressure value inside the buffer chamber 21 does not reach the preset value, the controller controls the negative pressure pump assembly 30 to be turned off.

[0119] In one embodiment of the present application, the pressure sensor 60 is mounted on the mounting surface of the buffer chamber 21 on the host 90 .

[0120] In this embodiment, the pressure sensor 60 is installed on the mounting surface of the buffer cavity 21 on the main unit 90. In this arrangement, the pressure sensor 60 is installed on the mounting surface of the buffer cavity 21 corresponding to the main unit 90. Since the air inlet is also arranged close to the mounting surface corresponding to the main unit 90, the pressure sensor 60 can effectively sense and measure the air pressure inside the buffer cavity 21, and can accurately detect the pressure value inside the buffer cavity 21, thereby improving the detection accuracy and stability of the pressure sensor.

[0121] In one embodiment of the present application, the breast pump further includes a liquid sensor, which is disposed in the buffer chamber 21 . The sensor is used to detect whether there is milk reflux in the buffer chamber 21 or to detect the amount of milk in the buffer chamber 21 .

[0122] In one embodiment, the liquid sensor can be a capacitive sensor (i.e., a magnetic component) or an infrared sensor. In the case of an infrared sensor, the infrared sensor can be located at the top of the buffer chamber 21 to detect changes in the liquid level within the buffer chamber 21 to determine whether milk is flowing back. Alternatively, the infrared sensor can be located on the side of the buffer chamber 21 to detect whether liquid within the buffer chamber 21 passes through a preset sensor height, thereby determining whether milk is flowing back. In the case of a capacitive sensor, the amount of milk in the buffer chamber 21 can be determined by changes in the height, magnetic force, or spacing of the detection element.

[0123] In one embodiment, the liquid level sensor 80 is arranged on the side wall of the buffer chamber 21. Specifically, the liquid level sensor 80 and the negative pressure pump assembly 30 are both communicatively connected to the controller. The controller can be arranged in the host device or outside the host device. When the liquid level sensor 80 detects that the refluxed milk in the buffer chamber 21 reaches a certain position, the liquid level sensor 80 can transmit the sensed liquid height signal to the controller in real time. The controller can feed back the received liquid height signal to the user to let the user know that the milk in the buffer chamber 21 has reached the full load height. The user can then stop the milk pumping process on his own and discharge the refluxed milk in the buffer chamber 21; or the controller controls the negative pressure pump assembly 30 to stop running according to the liquid signal, and then forcibly stops the milk pumping process to avoid the situation where there is too much milk in the buffer chamber 21 and overflows into electronic components such as the negative pressure pump assembly 30, thereby protecting the host device.

[0124] In one embodiment of the present application, as shown in Figure 3, one of the outer wall of the buffer isolation member 20 and the bottom wall of the accommodating groove 11 is convexly provided with a snap 25, and the other is concavely provided with a limiting groove 111. The buffer isolation member 20 and the cavity wall of the accommodating groove 11 are limited and inserted into the limiting groove 111 by the snap 25 to cooperate with the snap 25.

[0125] In this embodiment, one of the outer wall of the buffer isolator 20 and the bottom wall of the receiving groove 11 is provided with a protruding latch 25, while the other is provided with a recessed retaining groove 111. The buffer isolator 20 and the wall of the receiving groove 11 are positioned and inserted into the retaining groove 111 via the latch 25, thereby engaging the latch 25. It is understood that in one embodiment, the outer wall of the buffer isolator 20 may be provided with a protruding latch 25, while the bottom wall of the receiving groove 11 is provided with a recessed retaining groove 111; in another embodiment, the outer wall of the buffer isolator 20 may be provided with a recessed retaining groove 111, while the bottom wall of the receiving groove 11 may be provided with a protruding latch 25. Both of these arrangements can achieve the effect of connecting the buffer isolator 20 and the wall of the receiving groove 11 by means of the latch 25, thereby achieving a connection between the two. Furthermore, combined with the rear air inlet communicating with the connecting hole 113, the buffer isolator 20 is connected to the milk extraction passage 13. The connection method of the snap connection 25 is, on the one hand, easy to install and disassemble without the need for additional tools; on the other hand, the connection position of the two can be maintained after connection, thereby ensuring the tightness of the connection between the buffer isolation piece 20 and the receiving groove 11, and also ensuring the tightness of the connection between the connection hole 113 and the air inlet, ensuring the airtightness of the entire gas channel and ensuring the realization of a negative pressure environment.

[0126] In one embodiment of the present application, as shown in Figure 3, the number of the clips 25 and the limiting grooves 111 are both two, one of the two clips 25 or the two limiting grooves 111 is arranged on opposite sides of the connecting hole 113, and the other is arranged on opposite sides of the outer wall of the buffer isolation member 20, and one clip 25 is correspondingly limited and inserted into a limiting groove 111.

[0127] In this embodiment, there are two clips 25 and two limiting grooves 111. One of the two clips 25 or the two limiting grooves 111 is arranged on opposite sides of the connecting hole 113, and the other is arranged on opposite sides of the outer wall of the buffer isolation member 20. One clip 25 is correspondingly limited and inserted into a limiting groove 111. The setting of the two clips 25 and the two limiting grooves 111 can effectively fasten and connect the buffer isolation member 20 and the receiving groove 11 at different positions, realize the force combination at different positions, further ensure the tightness of the connection between the buffer isolation member 20 and the receiving groove 11, and also ensure the tightness of the connection between the connecting hole 113 and the air inlet, ensure the airtightness of the entire gas channel, and ensure the realization of a negative pressure environment.

[0128] In one embodiment of the present application, as shown in Figures 5 and 6, the breast pump further includes a milk storage container 40. The milk storage container 40 and the breast shield 10 enclose a milk storage cavity for collecting milk flowing into the milk suction channel 13. The milk suction channel 13 is located in the milk storage cavity.

[0129] In one embodiment, it can be understood that the milk storage container 40 and the breast shield 10 are enclosed to form a milk storage cavity, and the air inlet can be connected to the milk suction channel 13 and the milk storage cavity through the connecting hole 113, so that the milk suction channel is sucked to form a negative pressure environment. By operating the negative pressure pump 31 to generate negative pressure in the milk suction channel 13, the suction force generated by the milk suction channel 13 is used to suck out the milk in the breast, and the milk is stored in the milk storage container 40.

[0130] In one embodiment of the present application, as shown in FIG7 , the main unit is installed on a milk storage container 40 , and an air path connecting the milk suction channel 13 and the air inlet is provided on the milk storage container 40 .

[0131] In one embodiment, it can be understood that one end of the milk suction channel 13 is a milk suction port, and the other end is connected to the milk storage container 40. A connecting port is opened in the middle of the milk suction channel 13, which is connected to the connecting hole 113. The air inlet can be connected to the milk suction channel 13 and the milk storage cavity through the connecting hole 113. The milk suction channel is sucked to create a negative pressure environment inside it. By operating the negative pressure pump 31 to generate negative pressure in the milk suction channel 13, the suction force generated by the milk suction channel 13 sucks the milk in the breast and stores the milk in the milk storage container 40.

[0132] The present application also proposes a breast pump 1 .

[0133] In the embodiment of the present application, the breast pump 1 comprises:

[0134] At least one breast shield 10, the breast shield 10 including a milk extraction channel 13;

[0135] A host 90 including a negative pressure pump assembly 30 for providing negative pressure to the breast shield 10;

[0136] A buffer isolator 20 is provided on the main unit 90 to achieve fluid isolation and convenient disassembly and assembly of the buffer isolator. A buffer cavity 21 is formed in the buffer isolator 20. The buffer cavity 21 is provided with an air inlet and an air outlet 213. The air inlet is directly or indirectly connected to the milk suction channel 13, and the air outlet is connected to the negative pressure pump assembly. The buffer cavity 21 is used to accommodate refluxed milk.

[0137] In one embodiment, the buffer isolation member 20 is detachably connected to the host 90 .

[0138] In the above embodiment, the negative pressure pump assembly 30 includes a negative pressure pump 31 and an air duct 33. One end of the air duct 33 is connected to the negative pressure pump 31, and the other end is connected to the air outlet 213 of the buffer chamber 21. When the negative pressure pump 31 is operated, a negative pressure is generated in the milk extraction channel 13, so that the suction force generated by the breast shield connected to the milk extraction channel 13 can extract milk from the breast. Since the negative pressure pump 31 is connected to the buffer chamber 21 through the air duct 33, the air duct 33 is not directly connected to the air inlet. A buffer isolation member 20 is provided between the air duct 33 and the air inlet to intercept and collect milk absorbed during the suction process, thereby effectively preventing milk from being sucked into the host device through the air duct 33. When milk flows back into the buffer chamber 21 through the air inlet, the backflowing milk is collected in the buffer chamber 21. The buffer isolation member 20 serves to isolate the backflowing milk, preventing the backflowing milk from flowing into electronic components such as the negative pressure pump 31 and damaging the electronic components, thereby causing damage to the host device. Therefore, by providing a buffer isolator 20 to isolate and collect the refluxed milk, the buffer isolator 20 is arranged in the shell, which has the advantages of compact structure and simple structure. At the same time, it can effectively prevent milk from flowing back into the electronic components of the host device such as the negative pressure pump 31, thereby improving the safety and effectiveness of the milk pumping process and further ensuring the service life of the host device.

[0139] In one embodiment, the buffer spacer 20 is detachably connected to the receiving groove 11. The detachable connection may be a threaded connection, a snap 25 connection, a pin connection, a key connection, or the like, which is not limited herein. The detachable connection between the buffer spacer 20 and the receiving groove 11 allows the buffer spacer 20 to be removed from the breast shield 10 for independent emptying and cleaning when milk collected and stored within the buffer spacer 20 needs to be drained. This not only effectively prevents milk from flowing back into electronic components such as the vacuum pump 31, but also allows for quick cleaning of the buffer spacer 20, resulting in convenient operation and improved work efficiency.

[0140] In this embodiment, since the buffer isolation piece 20 is detachably connected to the receiving groove 11, a hole needs to be provided in the receiving groove 11 for connecting the buffer isolation piece 20 with the milk suction channel 13. Therefore, a connecting hole 113 is provided on the bottom wall of the receiving groove 11, and the air inlet is connected to the connecting hole 113. The air inlet can suck air into the milk suction channel 13 through the connecting hole 113 to create a negative pressure environment inside the milk suction channel. By operating the negative pressure pump 31 to generate negative pressure in the milk suction channel 13, the suction force generated by the milk suction channel 13 can suck out the milk in the breast, and the milk is stored in the milk storage container 40.

[0141] In this embodiment, the breast pump 1 further includes a detection device for detecting whether the buffer spacer 20 is properly installed. The detection device may be a pressure sensor, an airtightness detector, a vacuum detector, or the like. Specifically, the detection device and the negative pressure pump 31 are both communicatively connected to a controller, which may be located within or outside the host device. After the buffer spacer 20 is installed and the negative pressure pump 31 is turned on, the detection device can detect the air level inside the buffer chamber 21 and transmit the information to the controller in real time. The controller can compare the received data with preset air levels and provide feedback to the user to inform them of the pressure inside the buffer chamber 21 and determine whether the buffer spacer 20 is properly installed. If the air level inside the buffer chamber 21 does not reach the preset value, it can be determined that the buffer spacer 20 is not properly installed. The user can then turn off the negative pressure pump 31 and reinstall it on their own. If the air level inside the buffer chamber 21 reaches the preset value, it can be determined that the buffer spacer 20 is properly installed. The negative pressure pump 31 can be turned on again to complete the milk extraction operation.

[0142] The technical solution of the present application is to arrange the buffer isolation member 20 and the receiving groove 11 formed on the outer peripheral wall of the breast shield 10 in a detachable connection manner, so that the buffer isolation member 20 can be freely installed and removed from the breast shield 10. After installation, the air inlet of the buffer cavity 21 inside the buffer isolation member 20 is connected to the milk suction channel 13 of the breast shield 10, and the negative pressure pump assembly 30 is arranged in the receiving groove 11, and the negative pressure pump assembly 30 is connected to the air outlet 213 of the buffer cavity 21 through the air guide tube 33. During the process of sucking milk, the negative pressure pump assembly 30 is operated to generate negative pressure in the milk suction channel 13 so that the suction force generated by the milk suction channel 13 sucks the milk in the breast and stores the milk in the milk storage container 40. Since the negative pressure pump assembly 30 is connected to the buffer chamber 21 through the air duct 33, the air duct 33 is not directly connected to the air inlet, which can effectively prevent the milk from being sucked into the host device through the air duct 33. When the milk flows back to the buffer chamber 21 through the air inlet, the refluxed milk will be collected in the buffer chamber 21, and the buffer isolation member 20 plays an isolating role. The function of reflux milk: when the milk collected and stored in the buffer isolation member 20 needs to be poured out, the buffer isolation member 20 can be removed from the breast shield 10 for separate pouring, discharge and cleaning, which can not only effectively prevent the milk from flowing back into the electronic components such as the negative pressure pump assembly 30, but also quickly clean the buffer isolation member 20, which is convenient to operate and improves work efficiency. In addition, a detection device is provided, which is connected to the buffer chamber 21 and can detect whether the buffer isolation member 20 is installed in place, thereby ensuring the internal air tightness of the buffer isolation member 20 and the negative pressure milk suction effect of the buffer isolation member 20.

[0143] In an embodiment of the present application, the breast pump further comprises a controller, which is configured to stop the operation of the negative pressure pump assembly when it is detected that the buffer isolation member 20 is not installed in place.

[0144] In one embodiment, the detection device and the negative pressure pump assembly 30 are both in communication with a controller, which can be located inside or outside the host device. After the buffer isolation member 20 is installed, the controller can be controlled to turn on the negative pressure pump assembly 30. The detection device can detect the pressure value inside the buffer chamber 21 and transmit it to the controller in real time. The controller can compare the received data with the preset pressure data and feedback the comparison results to the user to determine whether the buffer isolation member 20 is properly installed. If the pressure value inside the buffer chamber 21 does not reach the preset value, the controller controls the negative pressure pump assembly 30 to be turned off.

[0145] In one embodiment of the present application, the breast pump further comprises a controller, which is used to provide a prompt device when detecting whether the buffer isolation member 20 is installed in place or not.

[0146] In this embodiment, the detection device and the negative pressure pump assembly 30 are both connected to the controller for communication, and also include a prompting device, which can be a prompting light, or a sound device such as a speaker, an audio light, or a display screen, etc. The prompting device is connected to the controller for communication. After the buffer isolation member 20 is installed, the controller can be controlled to turn on the negative pressure pump assembly 30, and the detection device can detect the pressure value inside the buffer chamber 21 and transmit it to the controller in real time. The controller can compare the received data with the preset pressure data. If the comparison result shows that the pressure value does not meet the standard, that is, it is judged that the buffer isolation member 20 is not installed in place, the controller controls the prompting device to open to achieve a reminder effect for the user. Alternatively, the prompting device can be in a continuously open state and have two display states, i.e., lights of different colors, different display lights, etc., which can also achieve a reminder effect for the user.

[0147] In one embodiment of the present application, the detection device includes at least one of a pressure sensor 60 and a photoelectric sensor.

[0148] In this embodiment, the breast pump 1 further includes a detection device for detecting whether the buffer isolation member 20 is properly installed. The detection device may be a pressure sensor, a photoelectric sensor, an airtightness detector, a vacuum detector, or the like. Furthermore, the detection device may be at least one of the pressure sensor 60 and the photoelectric sensor, i.e., the detection device may be a pressure sensor or a photoelectric sensor, or may be a combination of a pressure sensor and a photoelectric sensor. After the buffer isolation member 20 is installed, the controller may be controlled to turn on the negative pressure pump assembly 30 and the detection device. The detection device may detect the pressure value, optical signal, electrical signal, etc., inside the buffer chamber 21. The controller compares the received data with the preset data. If the pressure value inside the buffer chamber 21 does not reach the preset value, the controller controls the negative pressure pump assembly 30 to be turned off.

[0149] In one embodiment of the present application, the pressure sensor 60 is mounted on the mounting surface of the buffer chamber 21 on the host 90 .

[0150] In this embodiment, the pressure sensor 60 is installed on the mounting surface of the buffer cavity 21 on the main unit 90. In this arrangement, the pressure sensor 60 is installed on the mounting surface of the buffer cavity 21 corresponding to the main unit 90. Since the air inlet is also arranged close to the mounting surface corresponding to the main unit 90, the pressure sensor 60 can effectively sense and measure the air pressure inside the buffer cavity 21, and can accurately detect the pressure value inside the buffer cavity 21, thereby improving the detection accuracy and stability of the pressure sensor.

[0151] In one embodiment of the present application, the breast pump further includes a liquid sensor, which is disposed in the buffer chamber 21 . The sensor is used to detect whether there is milk reflux in the buffer chamber 21 or to detect the amount of milk in the buffer chamber 21 .

[0152] In one embodiment, the liquid sensor can be a capacitive sensor (i.e., a magnetic component) or an infrared sensor. In the case of an infrared sensor, the infrared sensor can be located at the top of the buffer chamber 21 to detect changes in the liquid level within the buffer chamber 21 to determine whether milk is flowing back. Alternatively, the infrared sensor can be located on the side of the buffer chamber 21 to detect whether liquid within the buffer chamber 21 passes through a preset sensor height, thereby determining whether milk is flowing back. In the case of a capacitive sensor, the amount of milk in the buffer chamber 21 can be determined by changes in the height, magnetic force, or spacing of the detection element.

[0153] In one embodiment, the liquid level sensor 80 is arranged on the side wall of the buffer chamber 21. Specifically, the liquid level sensor 80 and the negative pressure pump assembly 30 are both communicatively connected to the controller. The controller can be arranged in the host device or outside the host device. When the liquid level sensor 80 detects that the refluxed milk in the buffer chamber 21 reaches a certain position, the liquid level sensor 80 can transmit the sensed liquid height signal to the controller in real time. The controller can feed back the received liquid height signal to the user to let the user know that the milk in the buffer chamber 21 has reached the full load height. The user can then stop the milk pumping process on his own and discharge the refluxed milk in the buffer chamber 21; or the controller controls the negative pressure pump assembly 30 to stop running according to the liquid signal, and then forcibly stops the milk pumping process to avoid the situation where there is too much milk in the buffer chamber 21 and overflows into electronic components such as the negative pressure pump assembly 30, thereby protecting the host device.

[0154] In one embodiment of the present application, one of the outer wall of the buffer isolator 20 and the bottom wall of the accommodating groove 11 is convexly provided with a snap fastener 25, and the other is concavely provided with a limiting groove 111. The buffer isolator 20 and the cavity wall of the accommodating groove 11 are limited and inserted into the limiting groove 111 by the snap fastener 25 to cooperate with the snap fastener 25.

[0155] In this embodiment, one of the outer wall of the buffer isolator 20 and the bottom wall of the receiving groove 11 is provided with a protruding latch 25, while the other is provided with a recessed retaining groove 111. The buffer isolator 20 and the wall of the receiving groove 11 are positioned and inserted into the retaining groove 111 via the latch 25, thereby engaging the latch 25. It is understood that in one embodiment, the outer wall of the buffer isolator 20 may be provided with a protruding latch 25, while the bottom wall of the receiving groove 11 is provided with a recessed retaining groove 111; in another embodiment, the outer wall of the buffer isolator 20 may be provided with a recessed retaining groove 111, while the bottom wall of the receiving groove 11 may be provided with a protruding latch 25. Both of these arrangements can achieve the effect of connecting the buffer isolator 20 and the wall of the receiving groove 11 by means of the latch 25, thereby achieving a connection between the two. Furthermore, combined with the rear air inlet communicating with the connecting hole 113, the buffer isolator 20 is connected to the milk extraction passage 13. The connection method of the snap connection 25 is, on the one hand, easy to install and disassemble without the need for additional tools; on the other hand, the connection position of the two can be maintained after connection, thereby ensuring the tightness of the connection between the buffer isolation piece 20 and the receiving groove 11, and also ensuring the tightness of the connection between the connection hole 113 and the air inlet, ensuring the airtightness of the entire gas channel and ensuring the realization of a negative pressure environment.

[0156] In one embodiment of the present application, the number of the clips 25 and the limiting grooves 111 are both two, one of the two clips 25 or the two limiting grooves 111 is arranged on opposite sides of the connecting hole 113, and the other is arranged on opposite sides of the outer wall of the buffer isolation member 20, and one clip 25 is correspondingly limited and inserted into a limiting groove 111.

[0157] In this embodiment, there are two clips 25 and two limiting grooves 111. One of the two clips 25 or the two limiting grooves 111 is arranged on opposite sides of the connecting hole 113, and the other is arranged on opposite sides of the outer wall of the buffer isolation member 20. One clip 25 is correspondingly limited and inserted into a limiting groove 111. The setting of the two clips 25 and the two limiting grooves 111 can effectively fasten and connect the buffer isolation member 20 and the receiving groove 11 at different positions, realize the force combination at different positions, further ensure the tightness of the connection between the buffer isolation member 20 and the receiving groove 11, and also ensure the tightness of the connection between the connecting hole 113 and the air inlet, ensure the airtightness of the entire gas channel, and ensure the realization of a negative pressure environment.

[0158] In one embodiment of the present application, the breast pump further includes a milk storage container 40. The milk storage container 40 and the breast shield 10 enclose a milk storage cavity for collecting milk flowing into the milk suction channel 13. The milk suction channel 13 is located in the milk storage cavity.

[0159] In one embodiment, it can be understood that the milk storage container 40 and the breast shield 10 are enclosed to form a milk storage cavity, and the air inlet can be connected to the milk suction channel 13 and the milk storage cavity through the connecting hole 113, so that the milk suction channel is sucked to form a negative pressure environment. By operating the negative pressure pump 31 to generate negative pressure in the milk suction channel 13, the suction force generated by the milk suction channel 13 is used to suck out the milk in the breast, and the milk is stored in the milk storage container 40.

[0160] In one embodiment of the present application, the main unit is installed on a milk storage container 40 , and an air path connecting the milk suction channel 13 and the air inlet is provided on the milk storage container 40 .

[0161] In one embodiment, it can be understood that one end of the milk suction channel 13 is a milk suction port, and the other end is connected to the milk storage container 40. A connecting port is opened in the middle of the milk suction channel 13, which is connected to the connecting hole 113. The air inlet can be connected to the milk suction channel 13 and the milk storage cavity through the connecting hole 113. The milk suction channel is sucked to create a negative pressure environment inside it. By operating the negative pressure pump 31 to generate negative pressure in the milk suction channel 13, the suction force generated by the milk suction channel 13 sucks the milk in the breast and stores the milk in the milk storage container 40.

[0162] The present application also proposes a breast pump 1 .

[0163] The 'buffer isolation component' (20, 41) in this application can have different implementations. For example, in one implementation, it serves as an isolation chamber to prevent milk from flowing back; in another implementation, it can also serve as a buffer isolation component to prevent milk from directly entering the main unit.

[0164] The 'buffer isolation assembly' of the present application may adopt different structural forms. Reference numerals 20 and 41 are only used to distinguish specific embodiments and do not affect the integrity of the technical solution.

[0165] As shown in Figures 8 to 10, in one embodiment of the present application, the breast pump 1 includes at least one breast shield 10, a main unit 90, a buffer isolation member 41 and a detection member 50; the breast shield 10 includes a milk suction channel 13; the main unit 90 includes a negative pressure pump assembly 30 for providing negative pressure to the breast shield 10; a buffer cavity 21 is formed inside the buffer isolation member 41, and the buffer isolation member 41 has an air inlet 211 and an air outlet 213 connected to the buffer cavity 21, the air inlet 211 of the buffer cavity 21 is directly or indirectly connected to the milk suction channel 13, and the air outlet 213 of the buffer cavity 21 is connected to the negative pressure pump assembly 30; the detection member 50 is installed on the buffer isolation member 41 and is used to detect whether there is liquid in the buffer cavity 21.

[0166] In this embodiment, one side of the breast shield 10 is positioned to cover and adhere to the surface of the breast. A milk extraction channel 13 is provided within the breast shield for transferring the negative pressure generated by the negative pressure pump assembly 30 to the breast, thereby extracting breast milk. The breast shield 10 can be made of soft, harmless silicone or medical-grade plastic to ensure no skin irritation during use and provide a comfortable wearing experience. The negative pressure pump assembly 30 includes a negative pressure pump and components for connecting or mounting the negative pressure pump, such as an air pipe and a power cord. The main unit 90 includes a housing and the negative pressure pump assembly 30, which is mounted on the housing. Of course, the breast pump 1 may also be equipped with components such as a milk bowl and a one-way valve as needed.

[0167] The air inlet 211 and air outlet 213 of the buffer isolation member 41 respectively connect to the milk extraction channel 13 and the negative pressure pump assembly 30. The air inlet 211 can connect directly to the milk extraction channel 13 or indirectly via an elastic diaphragm or a pipe. During milk extraction, the negative pressure generated by the negative pressure pump assembly 30 is transmitted to the milk extraction channel 13 through the buffer chamber 21. At the same time, the storage space within the buffer chamber 21 prevents liquid in the milk extraction channel 13 or the milk bowl from flowing back into the main unit 90. Furthermore, to further prevent milk from flowing back into the main unit 90, a liquid storage element can be provided within the buffer chamber 21, such as a storage tank for storing milk or a water absorbent element to absorb backflowing milk.

[0168] The detection element 50 is mounted on the buffer isolation element 41. Specifically, the detection element 50 can be mounted inside or outside the buffer cavity 21. By placing a detection probe inside the buffer cavity 21, it is used to monitor the presence of liquid in the buffer cavity 21 in real time. The detection element 50 can be a capacitive sensor, an optical sensor, or a humidity sensor. These sensors can identify or detect the presence of liquid in the buffer cavity 21 and trigger an alarm mechanism to alert the user to the problem of milk reflux, allowing the user to promptly investigate the cause of the reflux.

[0169] Therefore, during milk extraction using the negative pressure breast pump 1, or when the user is removing or assembling the breast shield 10 or other components, if milk flows from the suction channel 13 toward the main unit 90 due to pressure fluctuations, backflow, or other factors, this reverse-osmosis milk will flow into the buffer chamber 21. The buffer chamber 21 serves to store the milk, preventing it from seeping into the main unit 90, thereby protecting the electronic components within the main unit 90. This also prevents milk from contaminating excessive components of the breast pump 1, thereby reducing the occurrence of hygiene issues. Furthermore, by providing the detection element 50, the user can determine whether reverse-osmosis of milk is occurring based on the detection results of the detection element 50, thereby facilitating timely adjustments to the operation of the breast pump 1.

[0170] In one embodiment of the present application, an elastic diaphragm is provided between the air inlet 211 of the buffer chamber 21 and the milk extraction passage 13. When the negative pressure pump assembly 30 generates negative pressure, the negative pressure gas acts on the elastic diaphragm, causing it to deform, thereby creating negative pressure within the milk extraction passage 13. By providing the elastic diaphragm between the air inlet 211 and the milk extraction passage 13, the elastic diaphragm prevents milk in the milk extraction passage 13 from flowing back into the main unit 90 through the air inlet 211, thereby increasing the service life of the main unit 90 components.

[0171] As shown in FIG. 10 , in one embodiment of the present application, the detection member 50 is a liquid sensor, the host 90 includes a control circuit, and the liquid sensor is electrically connected to the control circuit.

[0172] The liquid sensor can be a capacitive liquid sensor, an infrared liquid sensor, or a humidity sensor. For example, a capacitive liquid sensor can determine the presence of liquid by detecting changes in resistance; an infrared liquid sensor can determine the presence of liquid by emitting light and receiving reflected light; and a humidity sensor can detect changes in ambient humidity. The liquid sensor is electrically connected to the control circuit so that the host 90 can receive and analyze the liquid sensor's detection data, allowing the user to promptly understand the milk reverse osmosis status within the breast pump 1.

[0173] In one embodiment of the present application, the liquid sensor is at least one of a capacitor, a humidity sensor, a spring, or an infrared sensor.

[0174] In this embodiment, when a capacitor plate is used as the detection element 50, its operating principle is to determine whether liquid is present based on changes in capacitance. The capacitor plate is typically composed of two parallel metal plates with an insulating medium sandwiched between them. When liquid penetrates the buffer chamber 21 and contacts the capacitor plate, the capacitance value changes due to the different dielectric constants of liquid and air. The detection probe of the capacitive liquid sensor can also be designed as a spring structure, and the spring can be placed around the outer periphery of the pipe at the air inlet or outlet. When liquid flows through the pipe, the capacitance value detected by the spring detection probe of the capacitive liquid sensor will change. Of course, the liquid sensor can also be a humidity sensor, which detects changes in humidity within the buffer chamber 21 and then determines whether milk is present in the buffer chamber 21. Of course, the liquid sensor can be one of the above structures, or it can include two or more.

[0175] In one embodiment of the present application, the liquid sensor prompts the user, triggers an alarm, or triggers the host 90 to shut down the negative pressure pump assembly 30 when liquid seeps into the buffer chamber 21 .

[0176] In this embodiment, the control circuit of the host 90 receives and analyzes data from the liquid sensor to determine whether liquid is present in the buffer chamber 21. When liquid is present in the buffer chamber 21, the control circuit notifies the user via a display panel on the surface of the host 90 or triggers an alarm to indicate milk reverse osmosis. The control circuit is also in communication with the negative pressure pump assembly 30. When liquid is present in the buffer chamber 21, the control circuit controls the negative pressure pump assembly 30 to shut down, thereby preventing the exacerbation of milk reverse osmosis.

[0177] As shown in Figure 10, in one embodiment of the present application, the detection member 50 is arranged inside the buffer cavity 21, at least one place on the outer wall of the buffer cavity 21, or at least one position of the buffer isolation member 41 near the air inlet 211 and the air outlet 213. The detection member 50 is used to detect whether liquid has seeped into the buffer cavity 21.

[0178] In this embodiment, when the detection member 50 is mounted on the inner wall of the buffer chamber 21, it can directly contact the liquid in the buffer chamber 21, thereby providing the most direct and accurate detection results. The detection member 50 can be embedded in a mounting groove in the inner wall, or it can be adhered to the inner wall.

[0179] When the detection member 50 detects the presence of liquid in a non-contact manner, the detection member 50 can also be installed on the outer wall of the buffer cavity 21. The advantage of the outer wall installation is that it reduces the impact of the liquid on the detection member 50, extends the service life of the buffer isolation member 41, and also improves the installation convenience of the detection member 50. It can be understood that when the detection member 50 is set on the outer wall of the buffer cavity 21, the detection probe can be set in the buffer cavity 21 to detect the liquid in the buffer cavity 21; or a capacitive probe can be set on the outer periphery of the pipe to detect the change in capacitance to determine whether there is liquid in the buffer cavity 21.

[0180] Of course, the detection member 50 can also be installed on the surface of the buffer isolation member 41 near the buffer cavity 21, such as the position of the air inlet 211 or the air outlet 213. Installing it at this position can also detect whether there is liquid backflow into the buffer cavity 21, and this method can also improve the convenience of maintenance.

[0181] As shown in Figure 10, in one embodiment of the present application, the breast pump 1 further includes a liquid storage element 42, which is disposed in the buffer chamber 21 or in a position of the buffer chamber 21 near the air inlet 211 and the air outlet 213 to absorb or store the liquid entering the buffer chamber 21.

[0182] In this embodiment, the liquid storage element 42 can be a storage groove formed on the wall of the buffer cavity 21, or it can be an absorbent member disposed within the buffer cavity 21, such as a sponge or fiber pad. The provision of the liquid storage element 42 can absorb or store milk that flows back from the milk extraction passage 13, thereby preventing liquid from seeping into the main unit 90 and further enhancing the overall safety and reliability of the breast pump 1.

[0183] The liquid storage element 42 can be placed directly inside the buffer cavity 21 to maximize the use of the space of the buffer cavity 21 , thereby improving the effect of preventing milk from seeping into the interior of the main unit 90 .

[0184] The liquid storage element 42 can also be installed on the surface of the buffer isolation element 41 near the buffer cavity 21. For example, a small, detachable liquid storage box or water absorbent element can be installed on the outer wall of the buffer isolation element 41 or in the buffer cavity 21 near the air inlet 211 or the air outlet 213. This installation position makes the liquid storage element 42 easy to disassemble and clean.

[0185] 9 and 10 , in one embodiment of the present application, the buffer isolation member 41 includes a box body 20a and a cover plate 32 , the box body 20a is connected to the host 90 , the cover plate 32 is detachably mounted on the host 90 , and is enclosed with the box body 20a to form a buffer cavity 21 .

[0186] In this embodiment, the buffer isolation member 41 includes a box body 20a and a cover plate 32, wherein the box body 20a can be connected to the housing of the host 90 in a detachable manner. The box body 20a can also be configured to be an integrally molded structure with the housing of the host 90 to improve the convenience of assembly and facilitate the replacement of the liquid storage member 42 and the assembly of the liquid storage member 42 and the detection member 50. The shape of the box body 20a can be square, circular, or other geometric shapes. In order to further improve the sealing performance, the edge of the box body 20a can be designed with a structure having grooves or protrusions to better cooperate with the cover plate 32. Alternatively, a sealing ring can be provided at the connection between the cover plate 32 and the housing of the host 90 to prevent liquid leakage in the gap between the connection between the cover plate 32 and the housing.

[0187] In one embodiment of the present application, the liquid storage element 42 is detachably disposed in the buffer chamber 21;

[0188] And / or, the cover 32 is snap-fitted, screw-fitted, magnetically connected or fixed to the main unit 90 .

[0189] In this embodiment, the liquid storage element 42 of the breast pump 1 is detachably disposed within the buffer chamber 21. This design not only facilitates regular cleaning and replacement of the liquid storage element 42 by the user, but also ensures that the device remains in good working condition over the long term, effectively preventing liquid from seeping into the main unit 90, thereby protecting key electronic components from damage.

[0190] The liquid storage component 42 can be a water-absorbing structure such as a sponge, absorbent cotton, fiber pad or liquid-absorbing particles. The liquid storage component 42 is installed in the buffer cavity 21 through a detachable connection method such as bonding or snapping, or the liquid storage component 42 is movably placed in the buffer cavity 21 to facilitate replacement and installation of the liquid storage component 42.

[0191] Furthermore, the liquid storage element 42 can employ a multi-layer design, with each layer independently removable and replaceable. For example, the liquid storage element 42 can be divided into two or more layers, each detachably connected or stacked. This design not only improves liquid absorption efficiency but also allows for targeted replacement of the liquid storage elements 42 according to their respective saturation levels, thereby extending the service life of the entire liquid storage element 42.

[0192] In the case where the liquid storage element 42 is detachably disposed within the buffer chamber 21, or not, the cover plate 32 is detachably or fixedly mounted to the host 90 by snapping, screwing, or magnetic attraction. As shown in FIG10 , the housing of the host 90 is provided with a connection hole, which communicates with the box body 20a. The cover plate 32 is detachably connected to the wall of the connection hole by snapping or threading, and the box body 20a is sealed, so that the box body 20a and the cover plate 32 enclose and form the buffer chamber 21. This connection method makes it easier to assemble and disassemble the cover plate 32, making it easier for the user to regularly clean the buffer chamber 21 within the buffer isolation element 41. It also facilitates the placement of the liquid storage element 42 and the detection element 50 within the buffer chamber 21.

[0193] As shown in Figures 9 and 10, in one embodiment of the present application, the buffer chamber 21 includes a first chamber 21b and a second chamber 21a that are connected to each other. The volume of the first chamber 21b is larger than the volume of the second chamber 21a. The liquid storage element 42 is placed in the first chamber 21b and is adapted to the first chamber 21b.

[0194] In this embodiment, the first chamber 21b is mainly used to store the liquid storage element 42 and absorb the liquid entering the buffer chamber 21, while the second chamber 21a serves as an area connecting the first chamber 21b and the negative pressure pump assembly 30. While conducting negative pressure gas, it can also limit the movement of the liquid storage element 42.

[0195] The first chamber 21b has a large volume and occupies the main space of the entire buffer chamber 21. Its size and shape can be set according to actual needs to ensure that it can accommodate backflow milk during a certain number of milking cycles. The cross-sectional shape of the first chamber 21b can be designed to be rectangular, circular, or other geometric shapes. When the liquid storage element 42 is an absorbent element, such as a sponge, the shape of the sponge is set to match the shape of the first chamber 21b. For example, as shown in Figure 10, the liquid storage element 42 and the first chamber 21b are both set to be rectangular. Since the sponge, fiber pad, and other structures have pores inside, negative pressure gas can flow between the air inlet 211 and the air outlet 213 through the pores. Of course, in order to improve the absorption efficiency of milk and the smoothness of negative pressure flow, the outer peripheral side of the liquid storage component 42 can be fitted with the cavity wall of the first chamber 21b to maximize the effective water absorption area of ​​the liquid storage component 42. At the same time, the inner wall of the first chamber 21b can be designed to be rough or have microporous structures to increase the smoothness of gas flow from the air inlet 211 to the air outlet 213.

[0196] As shown in Figure 10 , the second chamber 21a is relatively small and located above the first chamber 21b. The liquid storage element 42 is larger than the second chamber 21a. Therefore, when the liquid storage element 42 is movably disposed within the first chamber 21b, it is confined within the first chamber 21b, preventing it from sloshing around or blocking the air outlet 213. Furthermore, the detection element 50 is disposed on the inner wall of the second chamber 21a to prevent it from being soaked in liquid for extended periods, thereby extending the service life of the detection element 50.

[0197] In one embodiment of the present application, the liquid storage element 42 is any one of a sponge, absorbent cotton, a fiber pad, a porous graphene material, or liquid-absorbing particles to absorb and prevent liquid from entering the host 90 .

[0198] Sponges, absorbent cotton, fiber pads, porous graphene materials and liquid-absorbing particles all have a large number of pores, which can ensure that the negative pressure gas generated by the negative pressure pump assembly 30 can pass through the liquid storage component 42. Therefore, even if the liquid storage component 42 is set to fit the side wall of the first chamber 21b, the smoothness of the gas flow can be guaranteed.

[0199] In one embodiment of the present application, the volume of the buffer chamber 21 is L, where 1 ml ≤ L ≤ 10 ml. When the volume of the buffer chamber 21 is small, for example, less than 1 ml, the capacity of the buffer isolation member 41 to store milk is limited, and the volume of the liquid storage member 42 that can be placed is also small. Therefore, when milk backflow occurs, the milk in the buffer chamber 21 is likely to overflow into the interior of the main unit 90, or the liquid storage member 42 needs to be frequently replaced. When the volume of the buffer chamber 21 is large, for example, greater than 10 ml, the buffer chamber 21 will occupy a large space inside the breast pump 1, resulting in a larger overall volume of the breast pump 1, which is inconvenient for the user to carry and use. Therefore, the volume of the buffer chamber 21 is set to 1 ml-10 ml, which meets the demand for miniaturization of the breast pump 1 while ensuring the effect of preventing milk backflow.

[0200] Preferably, the volume of the buffer chamber 21 is 4.3 ml.

[0201] As shown in FIG. 8 , in one embodiment of the present application, the breast pump 1 further includes a hose 43 , and both ends of the hose 43 are connected to the air inlet 211 and the milk suction channel 13 , respectively.

[0202] In this embodiment, a hose 43 connects the air inlet 211 and the milk extraction passage 13. The hose 43 can be made of materials such as silicone, PVC (polyvinyl chloride), or TPU (thermoplastic polyurethane), and has good flexibility. When milk backflow occurs, the milk flowing from the milk extraction passage 13 through the hose 43 will bend downward under the action of gravity, thereby partially blocking the flow of milk from the milk extraction passage 13 to the air inlet 211. To further reduce the risk of liquid backflow, the hose 43 can be designed with a certain inclination angle. For example, the end of the hose 43 near the buffer isolation member 41 can be slightly tilted upward to increase the difficulty of milk flowing into the buffer chamber 21.

[0203] The above are merely embodiments of the present application and are not intended to limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A breast pump, wherein: The breast pump comprises: A breast shield (10), the breast shield (10) comprising a milk extraction channel (13); A host (90), the host (90) comprising a negative pressure assembly (30) for providing negative pressure to the breast shield (10); a buffer isolator (20), the buffer isolator (20) being detachably connected to the main unit (90), a buffer cavity (21) being formed in the buffer isolator (20), a groove wall of the buffer cavity (21) being provided with an air intake and an air outlet (213), the air intake being in communication with the milk suction channel (13), the air outlet being in communication with the negative pressure assembly, and the buffer cavity (21) being used to accommodate refluxed milk; and A detection device is provided in the host computer and is used to detect whether the buffer isolation member (20) is installed in place.

2. The breast pump according to claim 1, wherein: The breast pump further comprises a controller, which is used to stop the operation of the negative pressure component when detecting that the buffer isolation member (20) is not installed in place.

3. The breast pump according to claim 1, wherein: The breast pump further comprises a controller, which is used to provide a prompt when detecting whether the buffer isolation member (20) is installed in place or not.

4. The breast pump according to claim 1, wherein: The detection device includes at least one of a pressure sensor (60) and a photoelectric sensor.

5. The breast pump according to claim 4, wherein: The pressure sensor (60) is mounted on the mounting surface of the buffer chamber (21) on the main machine (90).

6. The breast pump according to claim 1, wherein: The breast pump further comprises a liquid sensor, which is arranged in the buffer cavity (21). The sensor is used to detect whether there is milk flowing back in the buffer cavity (21) or to detect the amount of milk in the buffer cavity (21).

7. A breast pump according to any one of claims 1 to 6, wherein: The host (90) has a receiving groove (11), and the buffer isolation member (20) is installed in the receiving groove (11). One of the outer wall of the buffer isolation member (20) and the bottom wall of the receiving groove (11) is convexly provided with a buckle (25), and the other is concavely provided with a limiting groove (111). The buffer isolation member (20) and the groove wall of the receiving groove (11) are limitedly inserted into the limiting groove (111) by the buckle (25) to match the buckle (25).

8. A breast pump according to any one of claims 1 to 6, wherein: The number of the buckles (25) and the limiting grooves (111) is two, one of the two buckles (25) or the two limiting grooves (111) is arranged on opposite sides of the connecting hole (113), and the other is arranged on opposite sides of the outer wall of the buffer isolation member (20), and one buckle (25) is correspondingly limited and inserted into one limiting groove (111).

9. The breast pump according to claim 1, wherein: The breast pump further comprises the milk storage container (40), wherein the milk storage container (40) and the breast shield (10) enclose a milk storage cavity for collecting milk flowing into the milk suction channel (13), and the milk suction channel (13) is located in the milk storage cavity.

10. The breast pump of claim 1, wherein: The main machine is installed on the milk storage container (40), and the milk storage container (40) is provided with an air path connecting the milk suction channel (13) and the air suction port.

11. A breast pump, wherein: The breast pump comprises: at least one breast shield (10), the breast shield (10) comprising a milk extraction channel (13); a host (90), the host (90) comprising a negative pressure pump assembly (30) for providing negative pressure to the breast shield (10); A buffer isolator (20) is provided on the main unit (90) to achieve fluid isolation and convenient disassembly of the buffer isolator. A buffer cavity (21) is formed in the buffer isolator (20). The buffer cavity (21) is provided with an air inlet and an air outlet (213). The air inlet is directly or indirectly connected to the milk suction channel (13), and the air outlet is connected to the negative pressure pump assembly (30). The buffer cavity (21) is used to accommodate refluxed milk.

12. The breast pump according to claim 11, wherein: The buffer isolation member (20) is detachably connected to the host machine (90).

13. The breast pump of claim 11, wherein: The breast pump further comprises a detection device, which is arranged in the main unit and is used to detect whether the buffer isolation member (20) is installed in place.

14. The breast pump of claim 13, wherein: The host (90) further comprises a controller, which is used to stop the operation of the negative pressure pump assembly when detecting that the buffer isolation member (20) is not installed in place.

15. The breast pump of claim 13, wherein: The host (90) further comprises a controller, the controller being used as a prompt device for detecting whether the buffer isolation member (20) is installed in place or not installed in place.

16. The breast pump of claim 11, wherein: The detection device includes at least one of a pressure sensor (60) and a photoelectric sensor.

17. The breast pump of claim 14, wherein: The pressure sensor (60) is installed in the buffer cavity (21).

18. The breast pump of claim 11, wherein: The breast pump further comprises a liquid sensor, which is arranged in the buffer cavity (21). The sensor is used to detect whether there is milk flowing back in the buffer cavity (21) or to detect the amount of milk in the buffer cavity (21).

19. A breast pump according to any one of claims 11 to 18, wherein The host has a receiving groove (11), and the buffer isolation member (20) is installed in the receiving groove (11); One of the outer wall of the buffer isolator (20) and the accommodating groove (11) is convexly provided with a snap fastener (25), and the other is concavely provided with a limiting groove (111); the buffer isolator (20) and the accommodating groove (11) are limitedly inserted into the limiting groove (111) by the snap fastener (25) to cooperate with the snap fastener (25).

20. A breast pump according to any one of claims 1 to 8, wherein: The number of the buckles (25) and the limiting grooves (111) is two, one of the two buckles (25) or the two limiting grooves (111) is arranged on opposite sides of the connecting hole (113), and the other is arranged on opposite sides of the outer wall of the buffer isolation member (20), and one buckle (25) is correspondingly limited and inserted into one limiting groove (111).

21. The breast pump of claim 1, wherein: The breast pump further comprises the milk storage container (40), wherein the milk storage container (40) and the breast shield (10) enclose a milk storage cavity for collecting milk flowing into the milk suction channel (13), and the milk suction channel (13) is located in the milk storage cavity.

22. The breast pump of claim 1, wherein: The host (90) is connected to the milk storage container (40), and the milk storage container (40) is provided with an air path connecting the milk suction channel (13) and the air inlet.

23. A breast pump (1), wherein: The breast pump (1) comprises: at least one breast shield (10), wherein the breast shield (10) is provided with a milk extraction channel (13); a host (90), the host (90) comprising a negative pressure pump assembly (30) for providing negative pressure to the breast shield (10); a buffer isolator (41), wherein a buffer cavity (21) is formed inside the buffer isolator (41), the buffer isolator (41) has an air inlet (211) and an air outlet (213) communicating with the buffer cavity (21), the air inlet (211) of the buffer cavity (21) being directly or indirectly communicated with the milk suction channel (13), and the air outlet (213) of the buffer cavity (21) being communicated with the negative pressure pump assembly (30); and A detection member (50) is installed on the buffer isolation member (41) and is used to detect whether liquid exists in the buffer cavity (21).

24. A breast pump (1) according to claim 23, wherein: An elastic diaphragm is provided between the air inlet (301) of the buffer cavity (21) and the milk suction channel (11).

25. A breast pump (1) according to claim 24, wherein The detection element (50) is a liquid sensor, the host (20) includes a control circuit, and the liquid sensor is electrically connected to the control circuit.

26. The breast pump (1) according to claim 24, characterized in that The liquid sensor is at least one of a capacitor, a humidity sensor, a spring or an infrared sensor.

27. A breast pump (1) according to claim 24, wherein: When liquid seeps into the buffer chamber (21), the liquid sensor prompts the user, triggers an alarm, or triggers the host (20) to shut down the negative pressure pump assembly (30).

28. The breast pump (1) according to claim 23, wherein The detection member (50) is provided in at least one location within the buffer cavity (21) or on the outer wall of the buffer cavity (21), or in at least one location of the buffer cavity (21) close to the air inlet (211) or the air outlet (213). The detection member (50) is used to detect whether liquid has seeped into the buffer cavity (21).

29. A breast pump (1) according to any one of claims 23 to 28, wherein The breast pump (1) further comprises a liquid storage element (42), wherein the liquid storage element (42) is arranged in the buffer cavity (21) or at a position of the buffer cavity (21) close to the air inlet (211) and the air outlet (213) to absorb or store the liquid entering the buffer cavity (21).

30. A breast pump (1) according to claim 29, wherein: The buffer isolation member (41) comprises a box body (20a) and a cover plate (32), wherein the box body (20a) is connected to the host (90), and the cover plate (32) is installed on the host (90) and encloses the box body (20a) to form the buffer cavity (21).

31. A breast pump (1) according to claim 30, wherein: The liquid storage element (42) is detachably arranged in the buffer cavity (21); And / or, the cover plate (32) is snap-connected, screw-connected, magnetically connected or fixed to the host (90).

32. A breast pump (1) according to claim 30, wherein: The buffer chamber (21) comprises a first chamber (21b) and a second chamber (21a) which are connected to each other. The volume of the first chamber (21b) is larger than that of the second chamber (21a). The liquid storage element (42) is placed in the first chamber (21b) and is adapted to the first chamber (21b).

33. A breast pump (1) according to claim 30, wherein: The liquid storage element (42) is any one of a sponge, absorbent cotton, a fiber pad, a porous graphene material or liquid-absorbing particles, so as to absorb and prevent liquid from entering the host (90).

34. A breast pump (1) according to any one of claims 23 to 28, wherein The volume of the buffer chamber (21) is L, 1 ml≤L≤10 ml.

35. A breast pump (1) according to any one of claims 23 to 28, wherein The breast pump (1) further comprises a hose (43), and two ends of the hose (43) are respectively connected to the air inlet (211) and the milk suction channel (13).

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