Breast pump

Abstract

The utility model relates to the field of mother and baby products, and provides a breast pump. The utility model provides a breast pump. The breast pump comprises a milk storage container, a breast pumping shield, a negative pressure system, a milk flow path and a capacitance sensor, the milk flow path comprises at least one part of a milk flow path for milk to be discharged into the milk storage container from the milk sucking channel; the capacitive sensor is used for detecting the flow rate of milk passing through the milk flow path in a non-contact manner. According to the breast pump, the capacitance sensor is arranged in the mode of not making contact with the milk to detect the milk flow, so that the milk flow can be accurately measured, the service life of the capacitance sensor is prolonged, and the safety and sanitation of the measuring process of the breast pump are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of maternal and child products, and particularly relates to a breast pump. BACKGROUND

[0002] A breast pump is a tool for expressing and storing milk accumulated in mammary glands. It is generally used when a baby cannot suck milk directly, or when a mother's nipples have problems but she still wants to breastfeed.

[0003] In the prior art, milk flow detection is usually achieved by setting an optical sensor or the like on a milk flow path, such as a one-way valve, of a breast pump to detect the flow. However, since the related accessories need to be cleaned and disinfected, on the one hand, the service life of the sensor is easily damaged, and on the other hand, users are likely to disinfect the cleaning parts in a microwave oven, but the parts with sensors are easily involved in safety accidents when placed in the microwave oven. Therefore, the milk flow detection technology of the breast pump needs to be improved. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a breast pump that improves the milk flow detection requirements and is safe and hygienic.

[0005] To solve the above problems, the utility model provides the following technical scheme: a breast pump, which comprises a milk storage container for storing milk; a breast shield, the breast shield comprising a flange for fitting against a breast and a breast passage for receiving a nipple; a negative pressure system for directly or indirectly applying negative pressure to the nipple passage to suck out milk and discharge it into the milk storage container; a milk flow path comprising at least a part of the milk flow path from the breast passage to the milk storage container; and a capacitive sensor for detecting the flow of milk through the milk flow path in a non-contact manner.

[0006] In some embodiments, the capacitive sensor is a differential capacitive sensor assembly, which comprises a double-electrode capacitor and a control circuit; the double-electrode capacitor comprises a first electrode and a second electrode arranged opposite to each other; and the control circuit is used for charging the double-electrode capacitor and detecting the capacitance value of the double-electrode capacitor.

[0007] In some embodiments, the capacitive sensor comprises at least one group of first capacitive sensors for detecting milk flow and at least one group of second capacitive sensors for detecting interference values.

[0008] In some embodiments, the milk flow path has an outer wall that does not contact the milk, and the capacitive sensor is arranged on or near the outer wall.

[0009] In some embodiments, the breast pump further comprises a one-way valve; the milk flow path is in communication with and between the breast pumping passage and the one-way valve; at least a portion of the outer wall of the milk flow path is exposed outside the milk storage container.

[0010] In some embodiments, the breast pump further comprises a one-way valve; the milk flow path is in communication with and between the breast pumping passage and the one-way valve; at least a portion of the outer wall of the milk flow path is exposed outside the milk storage container.

[0011] In some embodiments, the capacitive sensor is disposed on the whole or a portion of the outer wall.

[0012] In some embodiments, the breast pump further comprises a one-way valve in communication with the breast pumping passage, through which milk flows into the milk storage container, and an outer sidewall of the one-way valve contacts an inner sidewall of the milk storage container; the breast pump further comprises a main housing assembled with the milk storage container, and the negative pressure system is disposed in the main housing; the capacitive sensor is mounted on an inner sidewall of the main housing at least in alignment with a position of the one-way valve, and / or the capacitive sensor is mounted on an outer sidewall of the main housing at least in alignment with a position of the one-way valve. The breast pump further comprises a one-way valve in communication with the breast pumping passage, through which milk flows into the milk storage container, and an outer sidewall of the one-way valve contacts an inner sidewall of the milk storage container; the capacitive sensor is mounted on an outer sidewall of the milk storage container at least in alignment with a position of the one-way valve.

[0013] In some embodiments, the breast pump further comprises a one-way valve in communication with the breast pumping passage, through which milk flows into the milk storage container, and an outer sidewall of the one-way valve contacts an inner sidewall of the milk storage container; the capacitive sensor is mounted on an outer sidewall of the milk storage container at least in alignment with a position of the one-way valve.

[0014] In some embodiments, the capacitive sensor is aligned with the one-way valve away from a narrow end of the breast pumping passage.

[0015] In some embodiments, the milk storage container and the breast shield are assembled in connection, and a gap space is provided between the milk storage container and the breast shield, the capacitive sensor is mounted on the gap space, and the gap space is at least in alignment with the milk flow path.

[0016] In some embodiments, the breast pump further comprises a one-way valve, and the gap space is at least in alignment with the one-way valve.

[0017] In some embodiments, the milk suction channel includes an inner wall facing the nipple and an outer wall facing away from the nipple, and the capacitive sensor is mounted on the outer wall of the milk suction channel.

[0018] In some embodiments, the breast pump further includes a main housing assembled with the breast shield, the negative pressure system being disposed within the main housing; the main housing includes an outer side corresponding to the breast pumping channel; and the capacitive sensor is mounted on the outer side of the main housing at least aligned with the breast pumping channel.

[0019] The beneficial effects of this invention are: the capacitive sensor of the breast pump detects the flow rate of milk through the milk flow path in a non-contact manner, thus the capacitive sensor and other related electronic components will not contaminate the milk, ensuring the safety and hygiene of the milk; at the same time, when it is necessary to clean the breast pump accessories or put them in a microwave oven for sterilization, damage to the capacitive sensor or safety accidents can be avoided. Attached Figure Description

[0020] Figure 1 This is a perspective view of a first embodiment of the breast pump of this utility model.

[0021] Figure 2 This is a cross-sectional schematic diagram of a breast pump according to Embodiment 1 of the present invention.

[0022] Figure 3 This is a cross-sectional schematic diagram of a second embodiment of the breast pump of this utility model.

[0023] Figure 4 This is a front view of the main unit casing of a second embodiment of the breast pump according to this utility model.

[0024] Figure 5 This is a cross-sectional schematic diagram of a third embodiment of the breast pump of this utility model.

[0025] Figure 6 This is a cross-sectional schematic diagram of a fourth embodiment of the breast pump of this utility model.

[0026] Figure 7 for Figure 6 A simplified representation diagram.

[0027] Figure 8 This is a cross-sectional schematic diagram of one embodiment of the milk flow path of this utility model.

[0028] Figure 9 This is a cross-sectional schematic diagram of another embodiment of the milk flow path of this utility model.

[0029] Figure 10 This is a cross-sectional view of a fifth embodiment of the breast pump of this utility model.

[0030] Figure 11 For Figure 10 The simple expression diagram of the.

[0031] Figure 12 It is the schematic view of the breast pump embodiment six of the utility model.

[0032] Figure 13 It is the schematic view of the breast pump embodiment seven of the utility model.

[0033] Figure 14 It is the schematic view of the breast pump embodiment eight of the utility model.

[0034] Reference signs:

[0035] 100, breast pump, 101, main machine, 110, milk storage container, 111, breast shield, 121, flange, 12a, breast passage, 12b, milk outlet, 112, negative pressure system, 11a, milk flow path, 113, capacitance detector, 114, diaphragm, 115, one-way valve, 12c, milk inlet, 11b, outer wall, 116, negative pressure chamber, 117, main machine shell, 122, air pump, 13a, narrow end, 141, main machine shell inner side wall, 142, main machine shell outer side wall, 143, milk storage container outer side wall, 144, milk storage container inner side wall, 131, capacitance sensor, 151, first electrode, 152, second electrode, 161, detection section side wall, 12d, gap vacancy, 15a, first capacitance sensor, 15b, second capacitance sensor, 12f, breast passage outer side wall, 117a, main machine shell outer side. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the following combines with the drawings and examples, and the utility model is further described in detail. The examples of the examples are shown in the drawings, wherein the same or similar reference signs represent the same or similar units or units with the same or similar functions throughout. The examples described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0037] In the description of the utility model, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or units referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0038] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0039] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two units or the interaction relationship between two units. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0041] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0042] As Figures 1-14 shown, the breast pump 100 of the present application comprises a breast shield 111, a milk storage container 110 and a main machine 101. The breast shield 111, the milk storage container 110 and the main machine 101 can be detachably assembled into an integrated structure, or can be a split structure, and the present application does not limit whether it is an integrated structure or a split structure.

[0043] The breast shield 111 is used to cover the human breast and fit the breast. The breast shield includes a flared flange 121 for fitting the breast, and a breast pumping passage 12a for accommodating the nipple. The breast pumping passage is provided with a milk outlet 12b through which milk can flow into the milk storage container 110.

[0044] The milk storage container is used to receive and store the milk collected by the breast shield, and is in liquid communication with the breast shield.

[0045] Optionally, the milk storage container includes a milk cover, a milk bowl, a milk bottle, etc., which are not limited in the present application.

[0046] The host 101 is further provided with a negative pressure mechanism 112, which can directly or indirectly apply negative pressure to the breast shield to suck the breast milk into the milk storage container. Directly applying negative pressure to the breast pumping passage is that the negative pressure mechanism 112 for generating negative pressure directly communicates with the breast pumping passage through an air pipe to generate negative pressure and suck the milk into the milk storage container; indirectly applying negative pressure to the breast pumping passage is that the negative pressure mechanism 112 for generating negative pressure first transmits negative pressure to a deformable gas-liquid separation component, such as a diaphragm 114 or an air bag, and then indirectly applies negative pressure to the breast pumping passage through the vibration or deformation of the diaphragm or air bag to suck the milk into the milk storage container.

[0047] The negative pressure mechanism includes but is not limited to an air pump, a piezoelectric pump, a diaphragm pump, a hydraulic pump, a mechanical pump, etc., which are not limited in the present application.

[0048] Optionally, the host 101 can further include one or more of the following components: an energy supply module, a negative pressure gas circuit, a control circuit board, an electromagnetic valve, etc.

[0049] In the present application, in order to make the milk collected from the breast shield flow into the milk storage container, the breast pump of the present application further includes a milk flow path 11a, which includes at least a part of the milk flow path from the breast pumping passage to the milk storage container;

[0050] The breast pump of the present application further includes a capacitive sensor 113 for detecting the flow rate of the milk passing through the milk flow path in a non-contact manner.

[0051] The present application will be described in detail below according to specific embodiments.

[0052] Embodiment one:

[0053] Please refer to Figures 1-2As shown in the first embodiment provided by the present application, the breast pump 100 comprises a milk storage container 110, a breast shield 111, a main machine 101, a milk flow path 11a and a capacitive sensor 113; the milk storage container is used for storing the milk pumped from the human breast; the breast shield 111 comprises a flange 121 matched with the breast and a breast passage 12a for accommodating the nipple, and the breast passage is provided with a milk outlet 12b through which the milk can flow into the milk storage container.

[0054] The main machine 101 comprises a main machine shell 117, and a negative pressure system 112 is arranged in the main machine shell; the negative pressure system directly or indirectly applies negative pressure to the breast passage to pump the milk out and discharge it into the milk storage container; the milk flow path at least comprises a part of the milk flow path through which the milk discharged from the breast passage flows into the milk storage container.

[0055] Optionally, in the first embodiment, the milk storage container, the main machine and the breast shield of the breast pump are in an integrated detachable assembly structure.

[0056] According to the above scheme, it can be understood that the milk flow path 11a at least comprises a part of the milk flow path through which the milk discharged from the breast passage flows into the milk storage container, which can be understood as, in some embodiments, the milk flow path 11a comprises all the milk flow paths required for the milk discharged from the human nipple to flow into the milk storage container, for example, the milk discharged from the human nipple needs to pass through the breast passage 12a, and / or the one-way valve 115, and / or the negative pressure chamber 116, and / or the milk inlet 12c of the milk storage container, and the above-mentioned components through which the milk passes are all included in the milk flow path; and in other embodiments, the milk flow path comprises part of the milk flow path through which the milk discharged from the breast passage flows into the milk storage container, for example, the milk discharged from the human breast passes through the breast passage 12a and the one-way valve 115 to flow into the milk storage container, and the above-mentioned milk flow path comprises the breast passage or the one-way valve 115.

[0057] According to the above scheme, it can be understood that, please refer to Figures 1-2 As shown in the first embodiment provided by the present application, the breast pump 100 comprises a milk storage container 110, a breast shield 111, a main machine 101, a milk flow path 11a and a capacitive sensor 113; the milk storage container is used for storing the milk pumped from the human breast; the breast shield 111 comprises a flange 121 matched with the breast and a breast passage 12a for accommodating the nipple, and the breast passage is provided with a milk outlet 12b through which the milk can flow into the milk storage container.

[0058] It can be understood that, in the first embodiment, the milk flow path passes through the one-way valve, which can be understood as the one-way valve 115 is part of the milk flow path, and the capacitive sensor 113 is used to detect the flow of the milk passing through the milk flow path in a non-contact manner, that is, in the first embodiment, the capacitive sensor is used to detect the flow of the milk passing through the one-way valve 115 in a non-contact manner.

[0059] In this application, the main unit housing 117 includes an inner sidewall 141 and an outer sidewall 142. The inner sidewall 141 forms an inner cavity for housing internal electronic components, such as a negative pressure system or other electronic components. The outer sidewall 142 of the main unit housing 117 faces the milk storage container 110.

[0060] In this first embodiment, the capacitive sensor 113 is mounted on the inner wall 141 of the main unit housing, at least aligned with the one-way valve 115. It is understood that by mounting the capacitive sensor on the inner wall 141 of the main unit housing and aligning it with the one-way valve 115, the capacitive sensor can detect the flow rate of milk through the one-way valve 115 when milk flows through it. That is, the capacitive sensor 113 detects the flow rate of milk through the one-way valve 115 in a non-contact manner, ensuring the safety and hygiene of the milk. When the breast pump is not needed, the capacitive sensor can be separated from the milk storage container and the breast pump shield by removing them from the main unit housing. This allows for cleaning, emptying, and sterilization of the milk storage container and the breast pump shield without affecting any of these operations, thus achieving complete non-contact between the capacitive sensor and the milk.

[0061] In this embodiment, preferably, the capacitive sensor 113 is aligned with the narrow end 13a of the one-way valve 115, which is furthest from the milk expression channel 12a. The narrow end 13a is the end of the one-way valve 115 furthest from the milk expression channel 12a. Milk flow through this narrow end is more concentrated, stable, and uniform, resulting in better measurement data. Simultaneously, because the milk undergoes a certain degree of rectification as it passes through the one-way valve, the narrow end 13a reduces turbulence, allowing the capacitive sensor to obtain more accurate data. Furthermore, since the narrow end 13a is relatively far from the direct suction point, it experiences less pressure fluctuation, contributing to a more stable measurement environment.

[0062] Example 2

[0063] like Figures 3-4 As shown, in this second embodiment, the capacitive sensor 113 can be installed on the outer wall 142 of the main unit housing, at least aligned with the one-way valve.

[0064] In the second embodiment, the outer wall of the one-way valve 115 contacts the inner wall 144 of the milk storage container, and the outer wall 142 of the main housing 117 contacts the outer wall 143 of the milk storage container at least at the position corresponding to the one-way valve 115; preferably, the outer wall of the one-way valve closely contacts the inner wall of the milk storage container, and the position where the inner wall 144 of the milk storage container contacts the outer wall of the one-way valve 115 is inclined towards the inside of the milk storage container. The inclined design improves the continuity and stability of the liquid flow, reduces the turbulence phenomenon, provides a more stable measurement environment for the capacitive sensor, and thus obtains more reliable flow data. The outer wall of the main housing closely contacts the milk storage container at least at the position corresponding to the one-way valve.

[0065] In the second embodiment, the capacitive sensor 131 is a differential capacitive sensor assembly, which includes a double-electrode capacitor and a control circuit. The double-electrode capacitor includes a first electrode 151 and a second electrode 152 arranged opposite to each other. The control circuit is used to charge the double-electrode capacitor and detect the capacitance value of the double-electrode capacitor. It can be understood that the first electrode 151 and the second electrode 152 are arranged opposite to each other and located on both sides of the outer wall 142 of the main housing, so that a capacitor is formed between the first electrode 151 and the second electrode 152. The control circuit measures the charge and discharge characteristics of the capacitor to detect the change of the capacitance value. When there is no milk passing through, the medium between the first electrode and the second electrode is usually air or other fixed materials. At this time, the capacitor has an initial capacitance value C0. When milk starts to flow between the first electrode and the second electrode, the milk will enter between the two electrodes, replacing the original medium. Since the milk has a certain dielectric constant (ε), it will affect the capacitance value of the capacitor. The milk as a new medium changes the effective dielectric constant of the capacitor, thereby changing the capacitance value.

[0066] It can be understood that the control circuit will periodically charge and discharge the capacitor formed by the first electrode 151 and the second electrode 152. With the change of the milk flow, the volume of the medium in the capacitor changes, causing the capacitance value to change accordingly. By continuously monitoring the change of the capacitance value, the flow of the milk can be measured.

[0067] As Figure 4As shown, in this second embodiment, the capacitive sensor includes a first capacitive sensor 15a for detecting milk flow rate and a second capacitive sensor 15b for detecting interference values. It can be understood that the second capacitive sensor in this embodiment is used to detect the interference value of milk already stored in the milk storage container on the milk flow path to which the flow rate needs to be detected. By comparing the changes in the capacitance values ​​of the two capacitors, a differential signal can be obtained. This differential signal reflects the change in the measured physical quantity and can effectively eliminate some common-mode interference, so that the milk stored in the milk storage container will not affect the first capacitive sensor's measurement of the milk flow path, thereby improving the accuracy of milk flow rate measurement.

[0068] In other cases of this embodiment, the capacitive sensor may also be installed from the inner wall of the main unit housing to the outer wall, which facilitates the electrical connection of the capacitive sensor.

[0069] Example 3

[0070] like Figure 5 As shown in this embodiment, in this third embodiment, the capacitive sensor 113 is installed on the outer wall 143 of the milk storage container, at least aligned with the one-way valve 115. That is, the capacitive sensor 113 detects the flow rate of milk through the one-way valve 115 in a non-contact manner, ensuring the safety and hygiene of the milk. The capacitive sensor 113 is also detachably installed on the outer wall of the milk storage container. When the breast pump is not needed, the milk storage container can be removed from the main unit casing for cleaning, emptying, and sterilization. This further ensures convenient cleaning of the breast pump while achieving complete non-contact and contamination-free operation between the capacitive sensor and the milk.

[0071] Example 4:

[0072] like Figures 6-8 In this fourth embodiment, the milk storage container 110 of the breast pump is detachably assembled below the main unit 101, and the breast shield is detachably assembled to the milk storage container 110. The breast pump also includes a one-way valve 115 located partially or entirely in the milk storage container. The milk flow path 11a connects the milk suction channel 12a and the one-way valve 115 and is located between them. The milk flow path has an outer wall 11b that does not contact the milk. At least a portion of the outer wall 11b of the milk flow path 11a is exposed outside the milk storage container 110. It can be understood that in this embodiment, the portion of the outer wall of the milk flow path exposed outside the milk storage container does not contact the milk. The capacitive sensor 113 is disposed on or near the portion of the outer wall 11b of the milk flow path exposed outside the milk storage container, thereby enabling the capacitive sensor 113 to detect the flow rate of the milk through the milk flow path 11a in a non-contact manner, ensuring the safety and hygiene of the milk.

[0073] Please refer toFigure 8 and Figure 9 As shown, under different implementations, the capacitive sensor 113 is distributed around the entire circumference or part of the outer wall 11b of the milk flow path 11a. It can be configured to match the different structures of different breast pumps to maximize the detection accuracy of the capacitive sensor on different signal breast pumps.

[0074] Example 5:

[0075] like Figures 10-11 As shown, in this fifth embodiment, the breast pump 100's breast shield 111 is in liquid communication with the milk storage container 110. The breast pump also includes a negative pressure chamber 116 and a one-way valve 115 connected to the breast pump channel 12a. The milk flow path 11a connects the negative pressure chamber 116 and the one-way valve 115 and is located between them. At least a portion of the one-way valve 115 is located inside the milk storage container 110, and milk flows into the milk storage container 110 through the one-way valve.

[0076] At least a portion of the sidewall of the milk flow path 11a shares the flow detection section sidewall 161 with the sidewall of the milk storage container. The flow detection section sidewall 161 includes an inner sidewall that contacts the milk and an outer sidewall that does not contact the milk.

[0077] In one embodiment, the sidewall of the flow detection section 161 may be the sidewall of the milk flow path 11a, and the outer sidewall of the flow detection section 161 may be the outer wall 11b of the milk flow path. In other embodiments, the sidewall of the flow detection section 161 may also be the sidewall of the milk storage container 110.

[0078] In embodiment five, the capacitive sensor is installed on the outer wall of the flow detection section 161, or it can be installed close to the outer wall of the flow detection section 161. The outer wall of the flow detection section 161 does not come into contact with the milk, thereby enabling the capacitive sensor 113 to detect the flow rate of the milk through the milk flow path 11a in a non-contact manner, ensuring the safety and hygiene of the milk.

[0079] In Embodiment 5, the main unit 101 of the breast pump and the milk storage container 110 are detachably assembled. The negative pressure system 112 is installed inside the main unit housing 117. The diaphragm 114 is installed on the negative pressure chamber 116 of the milk storage container. The negative pressure chamber 116 is interconnected with the milk suction channel 12a and the one-way valve 115.

[0080] In the fifth embodiment, the capacitive sensor 113 is detachably mounted on or near the outer wall of the flow detection section 161, and when the breast pump is not in use, the capacitive sensor is detached so as to be separated from the milk storage container and the breast shield, thereby allowing the milk storage container and the breast shield to be cleaned, milked, disinfected and the like, and the capacitive sensor does not affect any of the foregoing operations. Thus, the capacitive sensor is completely non-contact and non-polluting with the milk, and the breast pump is further convenient to clean.

[0081] The sixth embodiment,

[0082] As Figure 12 shown in the sixth embodiment, the milk storage container 110 and the breast shield 111 are assembled and connected, and a gap space 12d is provided between the milk storage container and the breast shield, and the capacitive sensor 113 is mounted on the gap space 12d, and the gap space 12d is at least aligned with the milk flow path 11a; further, the breast pump further comprises a one-way valve 115, and the gap space 12d is at least aligned with the one-way valve 115, so that the capacitive sensor 113 mounted on the gap space can detect the flow of milk passing through the one-way valve 115.

[0083] In the sixth embodiment, the gap space 12d does not contact the milk, so as to realize the capacitive sensor 113 to detect the flow of milk passing through the milk flow path 11a in a non-contact manner, and to ensure the safety and hygiene of the milk.

[0084] The seventh embodiment

[0085] As Figure 13 shown, the main machine 101 of the breast pump is detachably assembled with the milk storage container 110 and the breast shield 111, and the negative pressure system 112 is provided in the main machine housing 117. The breast shield 111 comprises a flange 121 fitted to the breast and a breast suction passage 12a accommodating the nipple, and the breast suction passage 12a is provided with a milk outlet. The breast suction passage 12a comprises an inner side wall facing the nipple and an outer side wall 12f facing away from the nipple, and the capacitive sensor 113 is mounted on the outer side wall 12f of the breast suction passage for detecting the flow of milk passing through the breast suction passage 12a in a non-contact manner, and ensuring the safety and hygiene of the milk. It can be understood that in this embodiment, the capacitive sensor mounted on the breast suction passage 12a is detachably assembled, so that when the breast pump is not in use, the capacitive sensor can be detached from the breast suction passage, so that the breast suction passage can be cleaned and disinfected.

[0086] The eighth embodiment

[0087] As Figure 14As shown, the main machine 101 of the breast pump is detachably assembled with the milk storage container 110 and the breast shield 111, and the negative pressure system 112 is arranged in the main machine shell 117. The main machine shell 117 comprises an outer side surface 117a corresponding to the breast passage 12a; and the capacitive sensor 113 is mounted on the outer side surface 117a of the main machine shell at a position at least aligned with the breast passage 12a, so as to detect the milk passing through the breast passage 12a in a non-contact milk manner, thereby ensuring the safety and hygiene of the milk.

[0088] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art will understand that the technical solutions described in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A breast pump, characterized in that, include: Milk storage containers, used to store breast milk; A breast shield, the breast shield including a flange that conforms to the breast and a breast suction channel for receiving the nipple; A negative pressure system applies negative pressure directly or indirectly to the nipple canal to draw out milk and drain it into a milk storage container. Milk flow path, including at least a portion of the milk flow path in which the milk self-expression channel drains into the milk storage container; A capacitive sensor is used to detect the flow rate of milk through the milk flow path in a non-contact manner.

2. The breast pump according to claim 1, characterized in that: The capacitive sensor is a differential capacitive sensor assembly, which includes a dual-electrode capacitor and a control circuit. The dual-electrode capacitor includes a first electrode and a second electrode arranged opposite to each other. The control circuit is used to charge the dual-electrode capacitor and detect the capacitance value of the dual-electrode capacitor.

3. The breast pump according to claim 1 or 2, characterized in that: The capacitive sensor includes at least one set of first capacitive sensors for detecting milk flow and at least one set of second capacitive sensors for detecting interference values.

4. The breast pump according to claim 2, characterized in that: The milk flow path has an outer wall that does not contact the milk, and the capacitive sensor is located on or near the outer wall.

5. The breast pump according to claim 4, characterized in that: The breast pump also includes a one-way valve; the milk flow path connects the milk expression channel and the one-way valve and is located between the two; At least a portion of the outer wall of the milk flow path is exposed outside the milk storage container.

6. The breast pump according to claim 4, characterized in that: The breast pump shield is in liquid communication with the milk storage container; the breast pump also includes a negative pressure chamber and a one-way valve connected to the breast pumping channel; the milk flow path connects the negative pressure chamber and the one-way valve and is located between the two; At least a portion of the one-way valve is located inside the milk storage container, and milk flows into the milk storage container through the one-way valve; At least a portion of the outer wall of the milk flow path is shared with the side wall of the milk storage container.

7. The breast pump according to claim 5 or 6, characterized in that: The capacitive sensor is disposed around the entire circumference or in a portion of the outer wall.

8. The breast pump according to claim 2, characterized in that: The breast pump also includes a one-way valve connected to the milk suction channel, through which milk flows into the milk storage container, and the outer wall of the one-way valve contacts the inner wall of the milk storage container. The breast pump also includes a main unit housing assembled with the milk storage container, and the negative pressure system is located inside the main unit housing; The capacitive sensor is mounted on the inner wall of the main unit housing, at least aligned with the position of the one-way valve, and / or the capacitive sensor is mounted on the outer wall of the main unit housing, at least aligned with the position of the one-way valve.

9. The breast pump according to claim 2, characterized in that: The breast pump also includes a one-way valve connected to the milk suction channel, through which milk flows into the milk storage container, and the outer wall of the one-way valve contacts the inner wall of the milk storage container. The capacitive sensor is installed on the outer wall of the milk storage container, at least aligned with the one-way valve.

10. The breast pump according to claim 8 or 9, characterized in that: The capacitive sensor is aligned with the narrow end of the one-way valve away from the breast pumping channel.

11. The breast pump according to claim 2, characterized in that: The milk storage container and the breast pump shield are assembled and connected, and a gap is provided between the milk storage container and the breast pump shield. The capacitive sensor is installed in the gap, and the gap is at least aligned with the milk flow path.

12. The breast pump according to claim 11, characterized in that: The breast pump also includes a one-way valve, and the gap is at least aligned with the one-way valve.

13. The breast pump according to claim 2, characterized in that: The milk suction channel includes an inner wall facing the nipple and an outer wall facing away from the nipple, and the capacitive sensor is mounted on the outer wall of the milk suction channel.

14. The breast pump according to claim 2, characterized in that: The breast pump also includes a main unit housing assembled with the breast shield, and the negative pressure system is located inside the main unit housing; The main unit casing includes an outer surface corresponding to the breast suction channel; The capacitive sensor is mounted on the outer side of the main unit housing, at least aligned with the position of the breast pumping channel.

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