Breast pump

Abstract

The utility model discloses a breast pump, which relates to the technical field of maternal and infant nursing equipment, and comprises at least one breast pump shield, a host, a buffer piece and a detection piece, the breast sucking shield comprises a breast sucking channel; the main machine comprises a negative pressure pump assembly used for providing negative pressure for the breast suction shield. A buffer cavity is formed in the buffer part, the buffer part is provided with an air inlet and an air outlet which are communicated with the buffer cavity, the air inlet of the buffer cavity is communicated with the breast pumping channel, and the air outlet of the buffer cavity is communicated with the negative pressure pump assembly; the detection piece is installed on the buffer piece and used for detecting whether liquid exists in the buffer cavity or not. Due to the fact that the buffering cavity is formed in the negative pressure breast pump, reverse osmosis milk caused by pressure fluctuation, backflow and the like can flow into the buffering cavity in the milk sucking process of the negative pressure breast pump or when components of the breast pump are disassembled and assembled, the buffering cavity plays a role in storing the milk, the milk is prevented from permeating into the main machine, electronic elements in the main machine are protected, and the sanitation problem is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of maternal and infant nursing equipment, particularly relates to a breast pump. BACKGROUND

[0002] As a common maternal and infant product, the breast pump is widely used to help lactating mothers collect breast milk. At present, most breast pumps adopt a negative pressure breast pumping working mode. This working mode is widely accepted because of its relatively simple operation and convenient use.

[0003] However, when using the existing negative pressure breast pump during the breast pumping process, or when the user improperly operates when disassembling the breast pump components, milk may be back-seeped into the main unit due to pressure fluctuations, backflow, etc. This back-seepage phenomenon not only causes damage to the electronic components inside the main unit, affecting the service life and performance of the breast pump, but also may cause hygiene problems, posing potential risks to the user's health. SUMMARY

[0004] The main purpose of the utility model is to provide a breast pump, which aims to solve the problem of milk back-seepage into the main unit of the existing breast pump.

[0005] To achieve the above-mentioned purpose, the breast pump provided by the utility model comprises:

[0006] At least one breast shield, which comprises a breast milk suction channel;

[0007] A main unit, which comprises a negative pressure pump assembly for providing negative pressure to the breast shield;

[0008] A buffer member, which forms a buffer cavity inside, has an air inlet and an air outlet communicating with the buffer cavity, and the air inlet of the buffer cavity directly or indirectly communicates with the breast milk suction channel, and the air outlet of the buffer cavity communicates with the negative pressure pump assembly; and

[0009] A detection member, which is installed on the buffer member and is used to detect whether there is liquid in the buffer cavity.

[0010] In an embodiment of the utility model, an elastic diaphragm is arranged between the air inlet of the buffer cavity and the breast milk suction channel.

[0011] In an embodiment of the utility model, the detection member is a liquid sensor, the main unit comprises a control circuit, and the liquid sensor is electrically connected with the control circuit.

[0012] In an embodiment of the utility model, the liquid sensor is at least one of a capacitor sheet, a humidity sensor, a spring, or an infrared sensor.

[0013] In an embodiment of the utility model, the liquid sensor prompts the user, triggers an alarm or triggers the host to turn off the negative pressure pump assembly when liquid seeps into the buffer cavity.

[0014] In an embodiment of the utility model, the detection member is arranged at least one of the cavity of the buffer cavity and the outer wall of the buffer cavity, or arranged at the position close to at least one of the air inlet and the air outlet of the buffer cavity, and the detection member is used for detecting whether liquid seeps into the buffer cavity.

[0015] In an embodiment of the utility model, the breast pump further comprises a liquid storage member, and the liquid storage member is arranged at the position close to the air inlet and the air outlet in the buffer cavity to absorb or store the liquid entering the buffer cavity.

[0016] In an embodiment of the utility model, the buffer member comprises a box body and a cover plate, the box body is connected to the host, the cover plate is detachably mounted on the host by clamping, screwing or magnetic attraction, and the cover plate and the box body enclose the buffer cavity.

[0017] In an embodiment of the utility model, the liquid storage member is detachably arranged in the buffer cavity.

[0018] And / or, the cover plate is clamped, screwed, magnetically connected or fixed with the host.

[0019] In an embodiment of the utility model, the buffer cavity comprises a first chamber and a second chamber connected in communication, the volume of the first chamber is greater than the volume of the second chamber, and the liquid storage member is placed in the first chamber and is adapted to the first chamber.

[0020] In an embodiment of the utility model, the liquid storage member is any one of sponge, water-absorbing cotton, fiber pad, porous graphene material or liquid-absorbing particles to absorb and prevent liquid from entering the host.

[0021] In an embodiment of the utility model, the volume of the buffer cavity is L, and 1 milliliter≤L≤10 milliliters.

[0022] In an embodiment of the utility model, the breast pump further comprises a hose, and the two ends of the hose are communicated with the air inlet and the breast passage respectively.

[0023] The utility model discloses a breast pump includes at least one breast shield, a host computer, buffer and detection piece, wherein breast shield is equipped with breast passage, and the host computer includes negative pressure pump assembly, and negative pressure pump can produce negative pressure, and act on breast shield. Buffer forms buffer chamber in the inside, and buffer has the air inlet and gas outlet of buffer chamber communication simultaneously, wherein the air inlet is communicated with breast passage, and the gas outlet is communicated with negative pressure pump assembly. Therefore use negative pressure breast pump to suck milk process, or the user is in the disassembly breast shield or other components, and milk water flows from the direction of breast passage to the host computer under the influence of pressure fluctuation, backflow and the like, when these reverse osmosis milk water flow to buffer chamber, and buffer chamber plays the role of storing milk water, avoids the osmosis of milk water into the host computer, thereby the electronic element in the host computer is protected. Also avoid the milk water to contaminate the excessive component of breast pump, thereby reduce the occurrence of health problem.

[0024] In addition, the breast pump of the application also includes a detection piece, which is installed on the buffer and is used to detect whether there is liquid in the buffer chamber. Therefore, by setting the detection piece, it can be known through the detection result of the detection piece whether the milk water appears reverse osmosis, thereby facilitating the user to timely adjust the use operation of the breast pump. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the structure shown in these drawings without creative labor.

[0026] Figure 1 The structure schematic diagram of the breast pump of the utility model provides an embodiment;

[0027] Figure 2 For Figure 1 The sectional view along A-A of the breast pump;

[0028] Figure 3 For Figure 2 The local enlarged schematic view at B.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, breast pump;10, breast shield;11, breast passage;20, host computer;21, negative pressure pump assembly;30, buffer;301, air inlet;302, gas outlet;303, buffer chamber;303a, second chamber;303b, first chamber;31, box body;32, cover plate;40, liquid storage;50, detection piece;60, hose.

[0031] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0034] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the utility model.

[0035] The utility model provides a kind of breast pump 1.

[0036] In combination Figures 1 to 3 As shown in the drawings, in an embodiment of the utility model, the breast pump 1 includes at least one breast shield 10, a host 20, a buffer 30 and a detection piece 50;The breast shield 10 includes a breast passage 11;The host 20 includes a negative pressure pump assembly 21 for providing negative pressure to the breast shield 10;The buffer 30 is formed with a buffer cavity 303 inside, and the buffer 30 has an air inlet 301 and an air outlet 302 communicating with the buffer cavity 303, the air inlet 301 of the buffer cavity 303 is directly or indirectly communicated with the breast passage 11, and the air outlet 302 of the buffer cavity 303 is communicated with the negative pressure pump assembly 21;The detection piece 50 is installed on the buffer 30 and is used to detect whether there is liquid in the buffer cavity 303.

[0037] In the present embodiment, the side cover of the breast shield 10 is attached to the surface of the breast, and the inside is provided with a breast pumping channel 11 for transmitting the negative pressure generated by the negative pressure pump assembly 21 to the breast, so as to extract breast milk. The material of the breast shield 10 can be selected from soft and harmless to the human body silicone or medical grade plastic, so as to ensure that no irritation is caused to the skin during use and a comfortable wearing experience is provided. The negative pressure pump assembly 21 includes a negative pressure pump and components connected or installed with the negative pressure pump, such as air pipes, power lines, etc. The main machine 20 includes a shell and the negative pressure pump assembly 21, and the negative pressure pump assembly 21 is installed on the shell. Of course, the breast pump 1 can also be provided with a milk bowl, a one-way valve and other components as needed.

[0038] The air inlet 301 and the air outlet 302 of the buffer 30 are respectively communicated with the breast pumping channel 11 and the negative pressure pump assembly 21, wherein the air inlet 301 can be directly communicated with the breast pumping channel 11, or indirectly communicated with the breast pumping channel 11 through an elastic diaphragm or a pipeline. During breast pumping, the negative pressure generated by the negative pressure pump assembly 21 is transmitted to the breast pumping channel 11 through the buffer cavity 303, and at the same time, the storage space inside the buffer cavity 303 also prevents the liquid in the breast pumping channel 11 or the milk bowl from flowing back to the main machine 20. In addition, in order to improve the effect of preventing the leakage of milk back to the main machine 20, a liquid storage member can also be arranged in the buffer cavity 303, such as a storage groove for storing milk, or a water absorption member for absorbing the backflow of milk.

[0039] The detection member 50 is installed on the buffer 30, specifically, the detection member 50 can be installed in the buffer cavity 303, or installed outside the buffer cavity 303 and provided with a detection probe in the buffer cavity 303, for real-time monitoring whether there is liquid in the buffer cavity 303. The detection member 50 can be a capacitive sensor, or an optical sensor or a humidity sensor, etc. These sensors can identify or detect whether there is liquid in the buffer cavity 303 and trigger an alarm mechanism to prompt the user of the problem of backflow of milk, so that the user can check the reason of backflow of milk in time.

[0040] Therefore, during the process of using the negative pressure breast pump 1 to pump milk, or when the user disassembles the breast shield 10 or other components, the backflow of milk from the breast pumping channel 11 to the main machine 20 due to pressure fluctuation, backflow, etc. When these backflowing milk flows into the buffer cavity 303, the buffer cavity 303 plays a role of storing milk, avoiding the milk from flowing into the main machine 20, thereby protecting the electronic components inside the main machine 20. At the same time, it also avoids the milk from contaminating too many components of the breast pump 1, thereby reducing the occurrence of hygiene problems. In addition, by arranging the detection member 50, it can be known through the detection result of the detection member 50 whether the backflow of milk occurs, thereby facilitating the user to adjust the operation of the breast pump 1 in time.

[0041] In an embodiment of the utility model, the air inlet 301 of buffer cavity 303 and breast pumping channel 11 are equipped with elastic diaphragm. When negative pressure pump assembly 21 generates negative pressure, negative pressure gas acts on elastic diaphragm to make elastic diaphragm deform, and then form negative pressure in breast pumping channel 11. By setting elastic diaphragm between air inlet 301 and breast pumping channel 11, elastic diaphragm can prevent the milk in breast pumping channel 11 from flowing back to the inside of host computer 20 through air inlet 301, thereby improving the service life of each component of host computer 20.

[0042] In combination Figure 3 As shown in the utility model, in an embodiment of the utility model, the detection member 50 is a liquid sensor, and the host computer 20 includes a control circuit, and the liquid sensor is electrically connected with the control circuit.

[0043] The liquid sensor can be a capacitive liquid sensor, an infrared liquid sensor or a humidity sensor, etc. For example, the capacitive liquid sensor can determine whether there is liquid by detecting the change of resistance value; the infrared liquid sensor determines whether there is liquid by emitting light and receiving reflected light; and the humidity sensor detects based on the change of environmental humidity. The liquid sensor is electrically connected with the control circuit, so that the host computer 20 can receive and analyze the detection data of the liquid sensor, and the user can know the back seepage of the milk in the breast pump 1 in time.

[0044] In an embodiment of the utility model, the liquid sensor is at least one of a capacitive sheet, a humidity sensor, a spring or an infrared sensor.

[0045] In this embodiment, when the capacitive sheet is selected as the detection member 50, the working principle is based on the change of capacitance to determine whether there is liquid. The capacitive sheet is usually composed of two parallel metal plates with an insulating medium in between. When the liquid seeps into the buffer cavity 303 and contacts the capacitive sheet, the dielectric constant of the liquid is different from that of air, which will cause the change of capacitance value. The detection probe of the capacitive liquid sensor can also be designed as a spring structure, and the spring is sleeved on the outer periphery of the pipeline of the air inlet or air outlet. When the liquid flows through the pipeline, the capacitance value collected 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 the change of humidity in the buffer cavity 303, and then determines whether there is milk in the buffer cavity 303. Of course, the liquid sensor can be one of the above structures, or can include two or more.

[0046] In an embodiment of the utility model, the liquid sensor prompts the user, triggers the alarm or triggers the host computer 20 to close the negative pressure pump assembly 21 when the liquid seeps into the buffer cavity 303

[0047] In the embodiment, the control circuit of the host 20 receives and analyzes the data of the liquid sensor, and then determines whether there is liquid in the buffer cavity 303. When there is liquid in the buffer cavity 303, the control circuit prompts the user through the display panel on the surface of the host 20, or triggers the alarm through the alarm to prompt the occurrence of the backflow of the milk. The control circuit can also be in communication connection with the negative pressure pump assembly 21, and when there is liquid in the buffer cavity 303, the control circuit controls to close the negative pressure pump assembly 21, thereby avoiding the aggravation of the backflow problem of the milk.

[0048] In combination Figure 3 As shown in the embodiment of the utility model, the detection piece 50 is arranged at least one of the inner wall of the buffer cavity 303, the outer wall of the buffer cavity 303 or the position close to at least one of the air inlet 301 and the air outlet 302 of the buffer piece 30, and the detection piece 50 is used to detect whether liquid is infiltrated into the buffer cavity 303.

[0049] In the embodiment, when the detection piece 50 is installed on the inner wall of the buffer cavity 303, it can directly contact the liquid in the buffer cavity 303, thereby providing the most direct and accurate detection result. The installation groove can be opened on the inner wall, and the detection piece 50 can be embedded in the installation groove, or the detection piece 50 can be pasted on the inner wall.

[0050] When the detection piece 50 is in a non-contact mode to detect whether there is liquid, the detection piece 50 can also be installed on the outer wall of the buffer cavity 303. The advantage of the outer wall installation is to reduce the influence of the liquid on the detection piece 50, prolong the service life of the buffer piece 30, and improve the installation convenience of the detection piece 50. It can be understood that when the detection piece 50 is arranged on the outer wall of the buffer cavity 303, the detection probe can be arranged in the buffer cavity 303 to detect the liquid in the buffer cavity 303, or the capacitive probe can be sleeved on the outer periphery of the pipeline to detect the change of the capacitance to determine whether there is liquid in the buffer cavity 303.

[0051] Of course, the detection piece 50 can also be installed on the surface of the buffer piece 30 close to the position of the buffer cavity 303, such as the position of the air inlet 301 or the air outlet 302. The installation in this position can also detect whether the liquid backflows into the buffer cavity 303, and this mode can also improve the maintenance convenience.

[0052] In combination Figure 3 As shown in the embodiment of the utility model, the breast pump 1 further comprises a liquid storage piece 40, which is arranged in the buffer cavity 303 or the position close to the air inlet 301 and the air outlet 302 of the buffer cavity 303 to adsorb or store the liquid entering the buffer cavity 303.

[0053] In the embodiment, the liquid storage member 40 can be a storage groove formed on the surface of the cavity wall of the buffer cavity 303, or a water-absorbing member such as a sponge, a fiber pad or the like arranged inside the buffer cavity 303. By arranging the liquid storage member 40, the milk flowing back from the breast milk suction channel 11 can be absorbed or stored, thereby improving the effect of preventing liquid from penetrating into the main machine 20, and further improving the overall safety and reliability of the breast pump 1.

[0054] The liquid storage member 40 can be directly placed inside the buffer cavity 303, so as to maximize the space of the buffer cavity 303, thereby improving the effect of preventing milk from penetrating into the main machine 20.

[0055] The liquid storage member 40 can also be installed on the surface of the buffer member 30 close to the buffer cavity 303. For example, a small detachable liquid storage box or a water-absorbing member is arranged on the outer wall of the buffer member 30 or close to the air inlet 301 or the air outlet 302 of the buffer cavity 303, so that the liquid storage member 40 is convenient to disassemble and clean.

[0056] In combination with Figure 2 and Figure 3 In an embodiment of the utility model, the buffer member 30 includes a box body 31 and a cover plate 32, the box body 31 is connected to the main machine 20, and the cover plate 32 is detachably installed on the main machine 20 and forms the buffer cavity 303 together with the box body 31.

[0057] In the embodiment, the buffer member 30 includes the box body 31 and the cover plate 32, wherein the box body 31 can be connected to the shell of the main machine 20 in a detachable manner, or the box body 31 can be integrally formed with the shell of the main machine 20, so as to improve the convenience of assembly, and facilitate replacement of the liquid storage member 40 and assembly of the liquid storage member 40 and the detection member 50. The shape of the box body 31 can be square, circular or other geometric shapes. In order to further improve the sealing performance, the edge of the box body 31 can be designed as a structure with grooves or protrusions, so as to better cooperate with the cover plate 32. Alternatively, a sealing ring can be arranged at the connection between the cover plate 32 and the shell of the main machine 20, so as to prevent liquid from leaking through the gap between the cover plate 32 and the shell.

[0058] In an embodiment of the utility model, the liquid storage member 40 is detachably arranged in the buffer cavity 303.

[0059] And / or, the cover plate 32 is clamped, screwed, magnetically connected or fixed to the main machine 20.

[0060] In the embodiment, the liquid storage member 40 of the breast pump 1 is detachably arranged in the buffer cavity 303. This design not only facilitates the user to regularly clean and replace the liquid storage member 40, but also ensures that the device maintains good working condition for a long time, effectively prevents the liquid from penetrating into the main machine 20, and thus protects the key electronic components from being damaged.

[0061] The liquid storage member 40 can be a water-absorbing structure such as a sponge, water-absorbing cotton, a fiber pad or water-absorbing particles. The liquid storage member 40 is arranged in the buffer cavity 303 by means of detachable connection such as adhesion or clamping, or is placed in the buffer cavity 303 in a movable manner, so as to facilitate the replacement and installation of the liquid storage member 40.

[0062] Further, the liquid storage member 40 can be designed in a multi-layer structure, and each layer can be independently detached and replaced. For example, the liquid storage member 40 can be divided into two or more layers, and each layer is arranged by means of detachable connection or stacking. This design not only improves the liquid absorption efficiency, but also enables targeted replacement according to the water saturation of different layers of the liquid storage member 40, thereby prolonging the service life of the entire liquid storage member 40.

[0063] In the case where the liquid storage member 40 is arranged in the buffer cavity 303 or not, the cover plate 32 is detachably or fixedly installed on the main machine 20 by means of clamping, screwing or magnetic attraction, as shown in Figure 3 The shell of the main machine 20 is provided with a connecting hole, and the connecting hole is communicated with the box body 31. The cover plate 32 is detachably connected with the hole wall of the connecting hole by means of clamping or threaded connection, and seals the box body 31, so that the box body 31 and the cover plate 32 form the buffer cavity 303. This connection mode makes the cover plate 32 convenient to disassemble and assemble, facilitates the user to regularly clean the buffer cavity 303 inside the buffer member 30, and also facilitates the arrangement of the liquid storage member 40 and the detection member 50 in the buffer cavity 303.

[0064] As shown in Figure 2 and Figure 3 In an embodiment of the utility model, the buffer cavity 303 includes the first chamber 303b and the second chamber 303a communicated with each other, the volume of the first chamber 303b is greater than that of the second chamber 303a, and the liquid storage member 40 is placed in the first chamber 303b and is matched with the first chamber 303b.

[0065] In the embodiment, the first chamber 303b is mainly used for storing the liquid storage member 40 and absorbing the liquid entering the buffer cavity 303, and the second chamber 303a is used as a region communicated with the first chamber 303b and the negative pressure pump assembly 21, which not only conducts the negative pressure gas, but also limits the movement of the liquid storage member 40.

[0066] The first chamber 303b has a large volume and occupies the main space of the buffer chamber 303. The size and shape thereof can be set according to actual requirements to ensure that the backflow of milk can be accommodated within a certain number of milk extraction times. The cross-sectional shape of the first chamber 303b can be designed as a rectangle, a circle or other geometric shapes. When the liquid storage member 40 is a water-absorbing member such as a sponge, the shape of the sponge is set to be matched with the shape of the first chamber 303b, for example Figure 3 As shown, the liquid storage member 40 and the first chamber 303b are both set as cuboids. Since the sponge, the fiber pad and the like have pores inside the structure, the negative pressure gas can flow through the pores between the gas inlet 301 and the gas outlet 302. Of course, in order to improve the absorption efficiency of milk and the smoothness of the flow of negative pressure gas, the outer peripheral side of the liquid storage member 40 can be matched with the cavity wall of the first chamber 303b to maximize the effective water absorption area of the liquid storage member 40, and the inner wall of the first chamber 303b can be designed as a rough or microporous structure to increase the smoothness of the flow of gas from the gas inlet 301 to the gas outlet 302.

[0067] As shown, the liquid storage member 40 and the first chamber 303b are both set as cuboids. Since the sponge, the fiber pad and the like have pores inside the structure, the negative pressure gas can flow through the pores between the gas inlet 301 and the gas outlet 302. Of course, in order to improve the absorption efficiency of milk and the smoothness of the flow of negative pressure gas, the outer peripheral side of the liquid storage member 40 can be matched with the cavity wall of the first chamber 303b to maximize the effective water absorption area of the liquid storage member 40, and the inner wall of the first chamber 303b can be designed as a rough or microporous structure to increase the smoothness of the flow of gas from the gas inlet 301 to the gas outlet 302. Figure 3 It can be known that the volume of the second chamber 303a is relatively small and is located above the first chamber 303b. The size of the liquid storage member 40 is greater than the size of the second chamber 303a, so that when the liquid storage member 40 is movably arranged in the first chamber 303b, the liquid storage member 40 is limited in the first chamber 303b to avoid large shaking of the liquid storage member 40 or blockage of the gas outlet 302. At the same time, the detection member 50 is arranged on the inner wall of the second chamber 303a to avoid the detection member being soaked by liquid for a long time, thereby improving the service life of the detection member 50.

[0068] In an embodiment of the utility model, the liquid storage member 40 is any one of a sponge, water-absorbing cotton, a fiber pad, a porous graphene material or a liquid-absorbing particle to absorb and prevent liquid from entering the host 20.

[0069] The sponge, the water-absorbing cotton, the fiber pad, the porous graphene material and the liquid-absorbing particle all have a large number of pores to ensure that the negative pressure gas generated by the negative pressure pump assembly 21 can pass through the liquid storage member 40, so that even if the liquid storage member 40 is arranged to match the side wall of the first chamber 303b, the smoothness of the flow of gas can be ensured.

[0070] In an embodiment of the utility model, the volume of the buffer cavity 303 is L, 1ml≤L≤10ml. When the volume of the buffer cavity 303 is small, for example, less than 1ml, the capacity of the buffer piece 30 for storing milk is limited, and the volume of the liquid storage piece 40 that can be placed is also small, so when the milk backflows, the milk in the buffer cavity 303 is prone to overflow into the main machine 20, or the liquid storage piece 40 needs to be replaced frequently. When the volume of the buffer cavity 303 is large, for example, greater than 10ml, the buffer cavity 303 will occupy a large space inside the breast pump 1, resulting in a large overall volume of the breast pump 1, which is not convenient for users to carry and use. Therefore, the volume of the buffer cavity 303 is set to 1ml-10ml, which not only prevents milk backflow but also meets the demand for miniaturization of the breast pump 1.

[0071] In combination Figure 1 As shown in the utility model, in an embodiment of the utility model, the breast pump 1 further comprises a hose 60, and the two ends of the hose 60 are respectively connected to the air inlet 301 and the breast suction channel 11.

[0072] In this embodiment, the hose 60 is used to connect the air inlet 301 and the breast suction channel 11, and the hose 60 can be made of materials such as silicone, PVC (polyvinyl chloride), or TPU (thermoplastic polyurethane elastomer), which has good flexibility. When the milk backflows, the milk flows through the hose 60 from the breast suction channel 11, and under the action of gravity, the hose 60 will bend downward, thereby blocking the flow of milk from the breast suction channel 11 to the air inlet 301 to some extent. In order to further reduce the risk of liquid backflow, the hose 60 can be designed to have a certain inclination angle. For example, the end of the hose 60 close to the buffer piece 30 is slightly inclined upward, thereby increasing the difficulty of milk flowing to the buffer cavity 303.

[0073] The above is only an exemplary embodiment of the utility model, and does not limit the patent scope of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the utility model.

Claims

1. A breast pump, characterized in that, The breast pump includes: At least one breast shield, the breast shield being provided with a breast suction channel; A host unit, the host unit including a negative pressure pump assembly for providing negative pressure to the breast shield; A buffer element, wherein a buffer cavity is formed inside the buffer element, the buffer element has an air inlet and an air outlet communicating with the buffer cavity, the air inlet of the buffer cavity being directly or indirectly connected to the breast pump channel, and the air outlet of the buffer cavity being connected to the negative pressure pump assembly; and A detection element is installed on the buffer element and is used to detect whether there is liquid in the buffer cavity.

2. The breast pump as described in claim 1, characterized in that, An elastic diaphragm is provided between the air inlet of the buffer chamber and the breast pumping channel.

3. The breast pump as described in claim 1, characterized in that, The detection device is a liquid sensor, and the host includes a control circuit, with the liquid sensor electrically connected to the control circuit.

4. The breast pump as described in claim 3, characterized in that, The liquid sensor is at least one of a capacitor, a humidity sensor, a spring, or an infrared sensor.

5. The breast pump as described in claim 3, characterized in that, The liquid sensor alerts the user, triggers an alarm, or triggers the host to shut down the negative pressure pump assembly when liquid seeps into the buffer chamber.

6. The breast pump as described in claim 3, characterized in that, The detection element is disposed at least once inside the buffer cavity or on the outer wall of the buffer cavity, or at least once near the air inlet or the air outlet of the buffer cavity. The detection element is used to detect whether liquid has seeped into the buffer cavity.

7. The breast pump as described in any one of claims 1 to 6, characterized in that, The breast pump also includes a liquid storage device, which is located in the buffer chamber or near the air inlet and air outlet of the buffer chamber, to absorb or store the liquid entering the buffer chamber.

8. The breast pump as described in claim 7, characterized in that, The buffer component includes a housing and a cover plate. The housing is connected to the host computer, and the cover plate is installed on the host computer and together with the housing to form the buffer cavity.

9. The breast pump as described in claim 8, characterized in that, The liquid storage component is detachably disposed within the buffer cavity; And / or, the cover plate is snapped, screwed, magnetically connected to or fixed to the main unit.

10. The breast pump as described in claim 8, characterized in that, 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. The liquid storage device is placed in the first chamber and is adapted to fit the first chamber.

11. The breast pump as described in claim 8, characterized in that, The liquid storage device is any one of a sponge, absorbent cotton, fiber pad, porous graphene material, or liquid-absorbing particles, to absorb and prevent liquid from entering the host unit.

12. The breast pump as described in any one of claims 1 to 6, characterized in that, The volume of the buffer chamber is L, where 1 ml ≤ L ≤ 10 ml.

13. The breast pump as described in any one of claims 1 to 6, characterized in that, The breast pump also includes a flexible tube, the two ends of which are connected to the air inlet and the milk suction channel, respectively.

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