Air pump and breast pump

Abstract

The utility model discloses an air pump and breast pump relates to air pump technical field, wherein the air pump includes leather cup, piston frame and drive piece, the leather cup is provided with a plurality of air groove along its circumference interval, the inner circumference wall of each air groove includes two straight face and one cambered surface, the two straight face sets up symmetrically, and the cambered surface sets up the air groove along its circumference interval. The ends, close to the center of the leather cup, of the two straight faces are connected in an acute angle mode, and the arc face is connected with the ends, away from the center of the leather cup, of the two straight faces. A part of structure of the piston frame movably penetrates through the center of the leather cup, a plurality of piston bodies are formed on the piston frame, and each piston body is movably arranged in one air groove; the output end of the driving piece is connected with the piston frame, and the driving piece drives the piston frame to drive each piston body to move up and down in the corresponding air groove; according to the technical scheme, noise generated during operation of the air pump can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas pump technical field, especially a kind of gas pump and breast pump. BACKGROUND

[0002] In the existing air pump technology, air pump is mainly connected by motor shaft and eccentric shaft of piston frame, motor drives piston frame to form reciprocating deflection, to produce volume change in cylinder. This volume change cooperates with the one-way valve at the end, to form effective suction negative pressure. Specifically, the reciprocating deflection piston movement produces negative pressure in each cylinder, so that the gas is inhaled and compressed, and the pump of single-cylinder or multi-cylinder design is widely used in industry and daily life.

[0003] Although the existing air pump technology has shown good performance in many applications, but they still have some significant shortcomings. In related technology, cylinder is usually set as circular, and the number is limited to three to four cylinders, due to the limitation of cylinder number, pump produces obvious air pressure fluctuation when working, air pressure fluctuation brings obvious noise impact, especially when running at high frequency or long time, this noise problem becomes more prominent, and the comfort of surrounding environment is affected, and the operator of equipment can be disturbed. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of gas pump and breast pump, to reduce the noise generated when gas pump operation.

[0005] To achieve the above object, the utility model provides a gas pump, comprising:

[0006] The skin bowl is provided with a plurality of air grooves along its circumferential direction, the inner circumferential wall of each air groove includes two straight faces and an arc face, the two straight faces are symmetrically arranged, and the end of the two straight faces close to the center of the skin bowl is connected at an acute angle, and the arc face is connected with the end of the two straight faces away from the center of the skin bowl.

[0007] The piston frame is movably arranged in the center of the skin bowl, and the piston frame forms a plurality of piston bodies, each piston body is movably arranged in the air groove.

[0008] The output end of the driving member is connected with the piston frame, and the driving member drives the piston frame to drive each piston body to move up and down in the air groove.

[0009] In an embodiment, the curvature of the outer circumferential wall of the skin bowl is A, and the curvature of the arc face is B, wherein A

[0010] In an embodiment, the curvature of the peripheral wall of the skin bowl is A, and the curvature of the arc surface is B, wherein A=B.

[0011] In an embodiment, a circular arc transition section is formed at the connection between the arc surface and the two straight surfaces and at the connection between the two straight surfaces.

[0012] In an embodiment, the air pump comprises an eccentric wheel connected with the output end of the driving member, and the piston frame has an eccentric shaft, and the eccentric wheel is connected with the eccentric shaft of the piston frame.

[0013] In an embodiment, the air pump comprises a bottom shell forming an air cavity, the bottom shell is provided with an air inlet nozzle and a connecting channel communicated with the breast pump, the skin bowl is contained in the air cavity and connected with the bottom shell, the bottom wall of each air groove is provided with an air inlet hole, the bottom shell is connected with the driving member, and the output end of the driving member is movably arranged in the bottom shell.

[0014] In an embodiment, the bottom wall of each air groove is extended to form a flow guide section on the side facing the driving member, and the flow guide section is provided with a flow guide channel communicated with the air inlet hole.

[0015] In an embodiment, the air pump further comprises a middle frame and an air outlet frame, the middle frame is provided with a plurality of air vents at intervals along the circumference thereof, the middle frame is connected with the side of the skin bowl away from the bottom shell, and each air vent is arranged corresponding to each air groove; the air outlet frame is connected with the side of the middle frame away from the skin bowl, the air outlet frame is provided with a plurality of air outlet ports at intervals along the circumference thereof, and each air outlet port is arranged corresponding to each air groove; and part of the structure of the piston frame is located between the middle frame and the skin bowl.

[0016] In an embodiment, the air pump comprises a plurality of one-way valves, each one-way valve is connected with the inner peripheral wall of each air outlet port and arranged in a one-way direction from the air groove to the external environment; and / or

[0017] The air pump further comprises a top cover connected with the side of the air outlet frame away from the middle frame, and the top cover is provided with an air outlet nozzle communicated with the air outlet port.

[0018] The utility model further provides a breast pump comprising the air pump in any of the above embodiments.

[0019] In the technical scheme of the utility model, the driving member drives the piston frame to drive each piston body to move up and down in a gas groove, so that the piston body on the piston frame compresses the gas in the gas groove, the gas in the gas groove is discharged, negative pressure is generated, and the multiple gas grooves can significantly improve the efficiency of generating negative pressure; by setting the inner circumferential wall of the gas groove into two straight faces and an arc face, the number of the gas grooves is increased to improve the space utilization of the leather cup, and because the number of the gas grooves is increased, the pressure change of each gas groove does not occur at the same time, so that the pressure fluctuation of them can offset each other, the dispersed pressure change reduces the overall pressure fluctuation, the output of the air pump is more stable, the noise generated when the air pump operates is correspondingly reduced, the comfort of the environment is improved, and the interference on the operator is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0021] Figure 1 An embodiment of the utility model provides a structural schematic view of the air pump;

[0022] Figure 2 An embodiment of the utility model provides a front view of the leather cup;

[0023] Figure 3 An embodiment of the utility model provides a structural schematic view of the leather cup;

[0024] Figure 4 An embodiment of the utility model provides a sectional view of the air pump.

[0025] Explanation of the attached drawings:

[0026] 100, air pump;1, leather cup;11, gas groove;111, air inlet hole;112, flow guide section;112a, flow guide channel;113, straight face;114, arc face;115, circular arc transition section;2, piston frame;21, piston body;3, driving member;4, eccentric wheel;5, bottom shell;51, air cavity;52, air inlet nozzle;6, middle frame;61, air vent;7, air outlet frame;71, air outlet;8, check valve;9, top cover;91, air outlet nozzle.

[0027] The realization, functional characteristics and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0029] 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 positional relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0030] In addition, if the embodiments of the present application 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 solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solutions. 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 protection scope required by the present application.

[0031] The present application provides a kind of air pump 100.

[0032] Please refer to Figures 1 to 4 In an embodiment of the present application, the air pump 100 includes a cup 1, a piston frame 2 and a driving member 3, the cup 1 is spaced apart along its circumference and provided with a plurality of air grooves 11, the inner circumferential wall of each air groove 11 includes two straight faces 113 and an arc face 114, the two straight faces 113 are symmetrically arranged, one end of the two straight faces 113 close to the center of the cup 1 is connected at an acute angle, and the arc face 114 is connected with one end of the two straight faces 113 away from the center of the cup 1;Part of the structure of the piston frame 2 is movably arranged in the center of the cup 1, the piston frame 2 is formed with a plurality of piston bodies 21, each piston body 21 is movably arranged in one air groove 11;The output end of the driving member 3 is connected with the piston frame 2, and the driving member 3 drives the piston frame 2 to drive each piston body 21 to move up and down in one air groove 11.

[0033] In the technical scheme of the utility model, the driving member 3 drives the piston frame 2 to drive each piston body 21 to move up and down in a gas groove 11, so that the piston body 21 on the piston frame 2 compresses the gas in the gas groove 11, the gas in the gas groove 11 is discharged, negative pressure is generated, and the plurality of gas grooves 11 can significantly improve the efficiency of generating negative pressure; by setting the inner circumferential wall of the gas groove 11 as two straight faces 113 and an arc face 114, the number of the gas grooves 11 is increased to improve the space utilization of the leather cup 1, and since the number of the gas grooves 11 is increased, the pressure change of each gas groove 11 does not occur at the same time, so the pressure fluctuation of them can offset each other, the dispersed pressure change reduces the overall pressure fluctuation, the output of the air pump 100 is more stable, the noise generated when the air pump 100 works is correspondingly reduced, the comfort of the environment is improved, and the interference on the operator is reduced; the shape of the gas groove 11 can be a water drop shape or a fan shape, and the utility model does not limit this.

[0034] In an embodiment of the utility model, the curvature of the outer circumferential wall of the leather cup 1 is A, and the curvature of the arc face 114 is B, wherein A < B. When the curvature of the arc face 114 is greater than the curvature of the outer circumferential wall of the leather cup 1, the shape of the gas groove 11 is similar to a water drop shape, the water drop-shaped gas groove 11 is arranged to make the number of the gas grooves 11 that can be arranged on the leather cup 1 more, improve the space utilization of the leather cup 1, and the water drop-shaped gas groove 11 is helpful to the smooth flow of the gas in the gas groove 11, reduces the formation of turbulent flow and vortex flow, thereby improving the efficiency of the gas flow, making the pressure distribution in the gas groove 11 more uniform, reducing the local high-pressure area, and reducing the noise and vibration generated when the air pump 100 works.

[0035] In an embodiment of the utility model, the curvature of the outer circumferential wall of the leather cup 1 is A, and the curvature of the arc face 114 is B, wherein A < B. When the curvature of the arc face 114 is greater than the curvature of the outer circumferential wall of the leather cup 1, the shape of the gas groove 11 is similar to a water drop shape, the water drop-shaped gas groove 11 is arranged to make the number of the gas grooves 11 that can be arranged on the leather cup 1 more, improve the space utilization of the leather cup 1, and the water drop-shaped gas groove 11 is helpful to the smooth flow of the gas in the gas groove 11, reduces the formation of turbulent flow and vortex flow, thereby improving the efficiency of the gas flow, making the pressure distribution in the gas groove 11 more uniform, reducing the local high-pressure area, and reducing the noise and vibration generated when the air pump 100 works.

[0036] Further, please refer to Figure 2In an embodiment of the utility model, the connecting place of the curved surface 114 and two straight surfaces 113 and the connecting place of two straight surfaces 113 are all formed with a circular arc transition section 115. The circular arc transition section 115 can reduce stress concentration of the curved surface 114 and the straight surface 113 at the connecting place, prolong the service life of the leather bowl 1, the circular arc transition section 115 helps to uniformly distribute pressure, enhances the structural stability of the leather bowl 1; in the gas groove 11, the circular arc transition section 115 can improve the dynamic performance of gas flow, reduce turbulence and vortex, improve the efficiency of gas flow, reduce the vibration when the air pump 100 operates, thereby reducing the noise; the design of the circular arc transition section 115 makes the inside of the gas groove 11 more smooth, facilitates maintenance and cleaning, reduces the accumulation of gas impurities; the circular arc transition section 115 can reduce the wear of the piston body 21 when moving in the gas groove 11, improve the durability of the air pump 100 parts.

[0037] Please refer to Figure 1 and Figure 4 In an embodiment of the utility model, the air pump 100 includes an eccentric wheel 4, the eccentric wheel 4 is connected with the output end of the driving part 3, the piston holder 2 has an eccentric shaft, the eccentric wheel 4 is connected with the eccentric shaft of the piston holder 2. The main role of the eccentric wheel 4 is to drive the piston body 21 on the piston holder 2 to reciprocate through the centrifugal force generated by the eccentric mass thereof, and this reciprocation makes the piston body 21 move up and down in the gas groove 11, thereby realizing the suction and discharge of gas; when the air pump 100 works, the driving part 3 drives the eccentric wheel 4 to rotate, the eccentric part of the eccentric wheel 4 drives the eccentric shaft to rotate eccentrically, and this rotation is transmitted to the piston body 21 through the piston holder 2, so that the piston body 21 moves up and down in the gas groove 11, thereby compressing the gas in the gas groove 11 and generating negative pressure.

[0038] Specifically, please refer to Figure 1 and Figure 4In an embodiment of the utility model, the air pump 100 includes bottom shell 5, bottom shell 5 forms air cavity 51, bottom shell 5 is equipped with air inlet nozzle 52 and the connecting channel that communicates with breast pump, the leather bowl 1 is contained in air cavity 51 and is connected with bottom shell 5, the bottom wall of each air groove 11 is equipped with air inlet hole 111, bottom shell 5 is connected with driving part 3, the output end of driving part 3 is movably arranged in bottom shell 5. When driving part 3 (such as motor) starts, its output end drives each piston body 21 of piston frame 2 to move up and down in an air groove 11, when piston body 21 moves down, air inlet nozzle 52 is closed in this process, the gas in air cavity 51 enters each air groove 11 through each air inlet hole 111, and the gas is compressed and discharged from air pump 100 when piston body 21 moves down, the discharge of gas is realized, thereby generating negative pressure in air cavity 51, and the negative pressure is transmitted to breast pump through the connecting channel;When piston body 21 moves up, air inlet nozzle 52 is opened in this process, external air enters air cavity 51 through air inlet nozzle 52 to supplement the negative pressure in air cavity 51, and the intake of gas is realized;Driving part 3 drives piston frame 2 to reciprocate so that the air pressure in air cavity 51 changes, thereby realizing the air intake and air exhaust of air pump 100.

[0039] Please refer to Figure 3 And Figure 4 In an embodiment of the utility model, the bottom wall of each air groove 11 extends to form a flow guide section 112 on the side facing the driving part 3, and the flow guide section 112 is provided with a flow guide channel 112a that communicates with the air inlet hole 111. The bottom wall of each air groove 11 extends to form a flow guide section 112 on the side facing the driving part 3, and the flow guide section 112 is provided with a flow guide channel 112a that communicates with the air inlet hole 111. The design of the backflow channel allows external air or gas in the air cavity 51 to smoothly flow into or out of the air groove 11 when the piston body 21 moves, which helps to guide the airflow to enter and exit the air groove 11 more smoothly, thereby improving the efficiency of the air pump 100;When piston body 21 moves up, the pressure in air cavity 51 decreases, external air enters air cavity 51 through air inlet nozzle 52, and flow guide channel 112a allows air to smoothly flow into air groove 11 to supplement the negative pressure in air cavity 51;When piston body 21 moves down, the gas in air groove 11 is compressed, and the design of flow guide channel 112a and flow guide section 112 allows the gas to be compressed more effectively and discharged from air groove 11, realizing the discharge of gas;The design of flow guide section 112 and flow guide channel 112a helps to reduce the turbulence and vortex of airflow, improve the efficiency of airflow, and reduce the noise and vibration of air pump 100 during operation by optimizing the airflow path.

[0040] Further, please refer to Figure 1 And Figure 4In an embodiment of the utility model, the air pump 100 still includes middle frame 6 and air outlet frame 7, the middle frame 6 is spaced apart and is provided with a plurality of air vents 61 along its circumferential direction, the middle frame 6 is connected with the side of the leather cup 1 away from the bottom shell 5, and each air vent 61 is provided with a corresponding air groove 11;The air outlet frame 7 is connected with the side of the middle frame 6 away from the leather cup 1, and the air outlet frame 7 is spaced apart and is provided with a plurality of exhaust ports 71 along its circumferential direction, and each exhaust port 71 is provided with a corresponding air groove 11;Part of the structure of the piston frame 2 is located between the middle frame 6 and the leather cup 1.When the driving part 3 drives the piston frame 2 to drive the piston body 21 to move downwards, the air inlet nozzle 52 is closed, the air in the air cavity 51 enters each air groove 11 in turn through each air inlet hole 111, and is discharged from the air pump 100 through each exhaust port 71 on the air outlet frame 7 on the air vent 61 on the middle frame 6, the air in the air cavity 51 is compressed, and the pressure is reduced;When the driving part 3 drives the piston frame 2 to drive the piston body 21 to move upwards, the air inlet nozzle 52 is opened, the external air enters the air cavity 51 through the air inlet nozzle 52, the gas pressure in the air cavity 51 is increased, the driving part 3 drives the piston frame 2 to reciprocate so that the air pressure in the air cavity 51 changes, thereby realizing the air suction and air exhaust of the air pump 100;The design of the middle frame 6 and the air outlet frame 7 makes the gas exchange more efficient, the corresponding arrangement of the air vent 61 and the exhaust port 71 ensures the continuity and orderliness of the gas flow, and the design of the middle frame 6 and the air outlet frame 7 also helps to improve the air suction and air exhaust performance of the air pump 100, so that the air pump 100 can produce negative pressure more effectively.

[0041] Please refer to Figure 1 and Figure 4 In an embodiment of the utility model, the air pump 100 includes a plurality of one-way valves 8, each one-way valve 8 is connected with the inner peripheral wall of a corresponding exhaust port 71 and is arranged in a one-way communication direction from the air groove 11 to the external environment;The air pump 100 further includes a top cover 9, the top cover 9 is connected with the side of the air outlet frame 7 away from the middle frame 6, the top cover 9 is provided with an air exhaust nozzle 91, and the air exhaust nozzle 91 is communicated with the exhaust port 71.The arrangement of the one-way valve 8 makes the air pump 100 only allow the gas to flow from the air groove 11 to the external environment, and cannot flow into the air groove 11 in the opposite direction;The air exhaust nozzle 91 is the outlet for discharging compressed gas from the air pump 100, the air exhaust nozzle 91 is communicated with the exhaust port 71 on the air outlet frame 7, so that the gas can be smoothly discharged from the inside of the air pump 100;The one-way valve 8 and the air exhaust nozzle 91 cooperate to realize the fixed air exhaust direction of the air pump 100, and maintain the normal operation of the air pump 100.

[0042] The utility model discloses still a kind of breast pump, the breast pump includes the air pump 100 described in any of the above embodiments, and the specific structure of the air pump 100 refers to the above embodiment, since the breast pump adopts all technical solutions of the above all embodiments, at least has all beneficial effects brought by the technical scheme of the above embodiment, here will not be elaborated one by one.

[0043] The above is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the contents of the drawings, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A gas pump characterized by, The air pump comprises: a skin bowl, which is provided with a plurality of air grooves at a circumferential interval thereof, an inner circumferential wall of each air groove comprises two straight faces and an arc face, the two straight faces are symmetrically arranged, and one end of the two straight faces close to the center of the skin bowl is connected at an acute angle, and the arc face is connected with one end of the two straight faces away from the center of the skin bowl; a piston frame, a part of the structure of the piston frame is movably arranged in the center of the skin bowl, the piston frame is formed with a plurality of piston bodies, and each piston body is movably arranged in the air groove; and a driving member, an output end of the driving member is connected with the piston frame, and the driving member drives the piston frame to drive each piston body to move up and down in the air groove.

2. The gas pump of claim 1, wherein, The curvature of the outer circumferential wall of the skin bowl is A, and the curvature of the arc face is B, wherein A 3. The gas pump of claim 1, wherein, The curvature of the outer circumferential wall of the skin bowl is A, and the curvature of the arc face is B, wherein A 4. The gas pump of claim 1, wherein, The connection part of the arc face and the two straight faces and the connection part of the two straight faces are both formed with a circular arc transition section.

5. The gas pump of any one of claims 1 to 4, wherein, The air pump comprises an eccentric wheel, the eccentric wheel is connected with the output end of the driving member, the piston frame has an eccentric shaft, and the eccentric wheel is connected with the eccentric shaft of the piston frame.

6. The gas pump of any one of claims 1 to 4, wherein, The air pump comprises a bottom shell, the bottom shell is formed with an air cavity, the bottom shell is provided with an air inlet nozzle and a connecting channel communicated with a breast pump, the skin bowl is arranged in the air cavity and connected with the bottom shell, the bottom wall of each air groove is provided with an air inlet hole, the bottom shell is connected with the driving member, and the output end of the driving member is movably arranged in the bottom shell.

7. The gas pump of claim 6, wherein The bottom wall of each air groove is extended to form a flow guide section on the side facing the driving member, and the flow guide section is provided with a flow guide channel communicated with the air inlet hole.

8. The gas pump of claim 6, wherein, The air pump further comprises a middle frame and an air outlet frame, the middle frame is provided with a plurality of air vents at a circumferential interval thereof, the middle frame is connected with the side of the skin bowl away from the bottom shell, each air vent is arranged corresponding to the air groove; the air outlet frame is connected with the side of the middle frame away from the skin bowl, the air outlet frame is provided with a plurality of air outlet ports at a circumferential interval thereof, each air outlet port is arranged corresponding to the air groove; and a part of the structure of the piston frame is located between the middle frame and the skin bowl.

9. The gas pump of claim 8, wherein, The air pump comprises a plurality of one-way valves, each one-way valve is connected with the inner circumferential wall of the air outlet port and is arranged in a one-way communication direction from the air groove to the external environment; and / or The air pump further comprises a top cover, the top cover is connected with the side of the air outlet frame away from the middle frame, the top cover is provided with an air outlet nozzle, and the air outlet nozzle is communicated with the air outlet port.

10. A breast pump, characterized in that The air pump comprises the air pump according to any one of claims 1 to 9.

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