CN215979809U

CN215979809U - Miniature air pump

Info

Publication number: CN215979809U
Application number: CN202022695066.0U
Authority: CN
Inventors: 许清香
Original assignee: Xiamen Keji Precision Equipment Co ltd
Current assignee: Xiamen Keji Precision Equipment Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2022-03-08
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a miniature air pump, comprising: the pump body assembly comprises a cover body, a valve seat and a bag seat which are sequentially and hermetically connected from top to bottom, wherein the cover body and the valve seat form an exhaust cavity together; a bladder body clamped between the valve seat and the bladder seat, the bladder body having a bladder cavity for pumping gas; the exhaust valve group is attached to the top surface of the valve seat and used for controlling the on-off of exhaust holes in the valve seat, a plurality of exhaust valve plates are integrated in the exhaust valve group, and a positioning structure is arranged at the central positions of the exhaust valve group and the valve seat and comprises an I-shaped positioning column and an I-shaped positioning groove which are matched with each other; a drive assembly; a connecting rod assembly. According to the miniature air pump provided by the embodiment of the utility model, the exhaust valve group is fixed on the valve seat through the I-shaped positioning column and the I-shaped positioning groove, so that the linear motion and the circumferential direction rotary motion of the exhaust valve group in the horizontal direction are limited, and the matching stability of the exhaust valve group and the valve seat is improved.

Description

Miniature air pump

Technical Field

The application relates to the technical field of pumps, in particular to a miniature air pump.

Background

Miniature air pump can apply to sphygmomanometer, medical equipment etc. and in the correlation technique, in order to reduce the assembly process, often set up the exhaust valve group that forms an integral erection with a plurality of exhaust valve block integrations, because every exhaust valve block corresponds different exhaust holes, consequently, the air current of equidirectional not can make the exhaust valve group rotate along the circumferential direction to influence miniature air pump and normally work.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, an object of the present invention is to provide a micro air pump, which utilizes an i-shaped positioning post to cooperate with an i-shaped positioning slot, and has a reliable structure, and since the position of the exhaust valve set relative to the valve seat is stable, the flapping sound of the exhaust valve plate is reduced, the working noise is reduced, the flow stability of the micro air pump is ensured, and the micro air pump can maintain a high flow all the time.

According to the embodiment of the utility model, the miniature air pump comprises: the pump body assembly comprises a cover body, a valve seat and a bag seat which are sequentially and hermetically connected from top to bottom, wherein the cover body and the valve seat jointly form an exhaust cavity; a bladder sandwiched between a valve seat and the bladder seat, the bladder having a bladder cavity that pumps gas; the exhaust valve group is attached to the top surface of the valve seat and used for controlling the on-off of exhaust holes in the valve seat, a plurality of exhaust valve plates are integrated in the exhaust valve group, and a positioning structure is arranged at the center positions of the exhaust valve group and the valve seat and comprises an I-shaped positioning column and an I-shaped positioning groove which are matched with each other; the driving assembly comprises a motor base and a motor connected to the motor base, and the motor base is connected with the lower side of the capsule seat; the connecting rod assembly is arranged in the motor base and in the installation space limited by the bag base, and comprises a connecting rod, a steel needle and an eccentric wheel which are sequentially connected, the connecting rod is connected with the bag body, the eccentric wheel is connected with a shaft of the motor, and the steel needle is connected with the eccentric wheel and the connecting rod.

According to the miniature air pump provided by the embodiment of the utility model, the exhaust valve group is fixed on the valve seat through the I-shaped positioning column and the I-shaped positioning groove, so that the linear motion and the circumferential direction rotary motion of the exhaust valve group in the horizontal direction are limited, and the matching stability of the exhaust valve group and the valve seat is improved.

In addition, the micro air pump according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the utility model, the positioning structure and the exhaust valve group are each an axisymmetric structure, and a central axis of the positioning structure is parallel to a diagonal of the exhaust valve group.

According to some embodiments of the utility model, the exhaust valve group comprises a body and a plurality of exhaust valve plates formed on the circumference of the body, and each exhaust valve plate corresponds to one exhaust hole.

In an optional embodiment, support ribs are arranged between adjacent exhaust valve plates, the root of each exhaust valve plate is connected to the body, a connecting wall is formed on the periphery of each exhaust valve plate, and the connecting wall is connected to the support ribs on two sides.

In a further optional embodiment, the thickness of the connecting wall is smaller than that of the air release valve plate.

In an optional embodiment, the top of the body is provided with a plurality of shunting blocks, and the shunting blocks are arranged at intervals to form a shunting channel.

According to some embodiments of the utility model, the exhaust valve assembly is an integrally formed rubber member.

According to some embodiments of the utility model, the bag body is provided with a plurality of bag cavities, the air inlet hole on the valve seat corresponds to each bag cavity in the vertical direction, and the bottom surface of the valve seat is provided with an air inlet valve plate for selectively controlling the on-off of the air inlet hole.

According to some embodiments of the utility model, the cover body, the valve seat, the bag seat and the motor seat are all provided with a clamping groove, a clamping hoop is arranged in the clamping groove, and two ends of the clamping hoop are provided with tightening arms, wherein one of the tightening arms is in press connection with the top of the cover body, and the other one of the tightening arms is in press connection with the bottom of the motor seat.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is an exploded view of a micro air pump according to some embodiments of the present invention;

FIG. 2 is a perspective view of a vent valve stack according to some embodiments of the present invention;

FIG. 3 is a top view of the exhaust valve stack of FIG. 1;

FIG. 4 is a bottom view of the exhaust valve assembly of FIG. 1;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a perspective view of the valve seat of FIG. 1;

FIG. 7 is a cross-sectional view of a micro air pump according to some embodiments of the utility model.

Reference numerals:

a micro air pump 100;

a cover 11; an intake pipe 111; an exhaust pipe 112;

a valve seat 12; an exhaust hole 121; an air intake hole 122;

a bag holder 13;

an exhaust chamber 101; an air intake chamber 102;

a capsule body 20; a capsule cavity 21;

an exhaust valve group 30; a body 31; an exhaust valve plate 32; the connecting wall 321; the support ribs 33; a diverter block 34; the flow dividing passage 341;

a positioning structure 40; an i-shaped positioning post 41; an i-shaped positioning slot 42; a stopper groove 421; a connecting groove 422;

a drive assembly 50; a motor base 51; a motor 52;

a connecting rod assembly 60; a connecting rod 61; a steel needle 62; an eccentric wheel 63;

an intake valve plate 70;

a card slot 81; a clamp 82; a tightening arm 821;

an intake valve plate 90.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 to 7, the micro air pump 100 according to the embodiment of the present invention includes a pump body assembly, a bladder 20, an exhaust valve set 30, a driving assembly 50, and a connecting rod assembly 60.

As shown in fig. 1, the pump body assembly includes a cover 11, a valve seat 12 and a bag seat 13, which are hermetically connected in sequence from top to bottom, wherein the cover 11 and the valve seat 12 together form an exhaust cavity 101. The cover 11, the valve seat 12 and the bag seat 13 may be formed as an integral plastic molding, thereby facilitating the manufacturing cost of the micro air pump 100.

A capsule 20 is clamped between the valve seat 12 and the capsule seat 13, the capsule 20 having a chamber 21 for pumping gas. The bladder cavity 21 can be stretched or compressed under the action of external force, thereby realizing inspiration or deflation. A single bladder 20 may generally define two or more chambers 21, each chamber 21 corresponding to one or a set of exhaust ports 121 in the valve seat 12, each chamber 21 being independently inflatable and deflatable.

The exhaust valve group 30 is attached to the top surface of the valve seat 12 and used for controlling the on-off of the exhaust holes 121 on the valve seat 12, the exhaust valve group 30 is integrally provided with a plurality of exhaust valve plates 32, the central positions of the exhaust valve group 30 and the valve seat 12 are provided with a positioning structure 40, and the positioning structure 40 comprises an I-shaped positioning column 41 and an I-shaped positioning groove 42 which are matched with each other. That is, the exhaust valve assembly 30 is positioned on the valve seat 12 by the positioning structure 40, as shown in fig. 4, the i-shaped positioning slot includes two limiting slots 421 and a connecting slot 422, the connecting slot 422 is connected between the two limiting slots 421, the two limiting slots 421 limit the linear motion of the exhaust valve assembly 30 in the horizontal direction, one end of the limiting slot 421 is a clamping point, and each limiting slot 421 has two ends, so that four clamping points are provided between the i-shaped positioning slot 42 and the i-shaped positioning post 41, and the four clamping points limit the motion of the exhaust valve assembly 30 in the circumferential direction.

Wherein, under the condition that the exhaust valve group 30 is matched with the top surface of the valve seat 12, the bottom surface of the exhaust valve group 30 is attached to the top surface of the valve seat 12, so that the sealing performance between each exhaust valve plate 32 and the valve seat 12 in the exhaust valve group 30 can be improved, and the normal flow of the air path is ensured.

The driving assembly 50 includes a motor base 51 and a motor 52 connected to the motor base 51, wherein the motor base 51 is connected to the lower side of the bag holder 13 and forms an installation space. The capsule 21 is driven up and down by the drive assembly 50, thereby changing the volume of the capsule 21.

The connecting rod assembly 60 is arranged in the installation space defined by the motor base 51 and the capsule base 13, the connecting rod assembly 60 comprises a connecting rod, a steel needle 62 and an eccentric wheel 63 which are connected in sequence, the connecting rod 61 is connected with the capsule body 20, the eccentric wheel 63 is connected with a shaft of the motor 52, and the steel needle 62 is connected with the eccentric wheel 63 and the connecting rod.

This miniature air pump 100 theory of operation is roughly as follows, the motor shaft drive link assembly 60 of motor 52 rotates to drive utricule 20 luffing motion, utricule 20 is at the luffing motion in-process, in the condition that utricule 20 was pulled up, the increase of bag chamber 21 volume, at this moment, external atmospheric pressure is greater than bag chamber 21 internal gas pressure, in the external air gets into bag chamber 21 earlier, at this moment, exhaust valve block 30's exhaust valve 32 seals the exhaust hole that corresponds bag chamber 21, thereby guarantees that bag chamber 21 inhales sufficient gas. Under the condition that the bag body 20 is compressed, the volume of the bag cavity 21 is reduced, at the moment, the external air pressure is smaller than the air pressure in the bag cavity 21, the exhaust valve sheet 32 is flushed, and correspondingly, the air enters the exhaust cavity and is finally pumped to the equipment to be inflated.

Therefore, according to the micro air pump 100 of the embodiment of the present invention, the air outlet valve set 30 is fixed on the valve seat 12 through the i-shaped positioning column 41 and the i-shaped positioning slot 42, so as to limit the linear motion and the circumferential direction rotational motion of the air outlet valve set 30 in the horizontal direction, and improve the stability of the air outlet valve set 30 matching with the valve seat 12.

In some embodiments of the present invention, as shown in fig. 4 in conjunction with fig. 5, the positioning structure 40 and the exhaust valve assembly 30 are each axisymmetric, with the central axis of the positioning structure 40 being parallel to the diagonal of the exhaust valve assembly 30. In other words, the central axis of the positioning structure 40 is not coincident with the central axis of the exhaust valve assembly 30, so that the engaging point of each limiting groove 421 of the i-shaped positioning groove 42 is located in different circumferential directions, in other words, four engaging points are provided between the i-shaped positioning groove 42 and the i-shaped positioning column 41, and the four engaging points are located in different circumferential directions, thereby effectively limiting the displacement of the exhaust valve assembly 30 in the circumferential direction and improving the stability of the fit between the exhaust valve assembly 30 and the valve seat 12.

In some embodiments of the present invention, the valve set 30 includes a body 31 and a plurality of vent plates 32 formed on the circumference of the body 31, and each vent plate 32 corresponds to one vent hole 121. Each exhaust valve plate 32 controls the on/off of one exhaust hole 121. It should be noted that, here, the "one air vent" does not refer to only one air vent 121 in number, but corresponds to one air vent 121 of one air bag 21, and the number of the air vents 121 corresponding to each air bag 21 may be one or more than one.

In a further alternative embodiment, as shown in fig. 2 and 3, support ribs 33 are disposed between adjacent discharge valve plates 32, a root portion of each discharge valve plate 32 is connected to the body 31, a connecting wall 321 is formed on a peripheral edge of each discharge valve plate 32, and the connecting wall 321 is connected to the support ribs 33 on both sides. So, can connect discharge valve piece 32 on brace rod 33 through the connection wall 321, like this, discharge valve piece 32 can slow down the tired damage of discharge valve piece 32 through connection wall 321 at the upper and lower flapwise in-process, prevents its transition deformation, improves the whole life of discharge valve group 30.

Further alternatively, the thickness of the connecting wall 321 is smaller than the thickness of the discharge valve sheet 32. Thus, the connecting wall 321 has better deformation capability than the air release valve plate 32, can adapt to the up-and-down movement of the air release valve plate 32, and does not cause great interference to the up-and-down movement of the air release valve plate 32, so that the air release valve plate 32 can effectively control the on-off of the air release hole.

In some embodiments of the present invention, a plurality of diversion blocks 34 are disposed on the top of the body 31, and the diversion blocks 34 are spaced apart to form the diversion channel 341. Thus, the airflow entering the exhaust cavity 101 can be divided through the flow dividing channel 341, and the flow speed of the airflow in the flow dividing channel 341 is slowed down to a certain extent, so that the purpose of reducing the noise of the airflow is achieved.

Optionally, the exhaust valve block 30 is an integrally formed rubber member. Therefore, the exhaust valve set 30 is convenient to form and low in manufacturing cost.

In some embodiments of the present invention, the capsule body 20 is formed with a plurality of cavities 21, the air inlet holes 122 on the valve seat 12 correspond to each cavity 21 in the vertical direction, the bottom surface of the valve seat 12 is provided with an air inlet valve sheet 70, and the air inlet valve sheet 70 is used for selectively controlling the on/off of each set of air inlet holes 122. That is, the valve seat 12 and the cover 11 together form an air inlet cavity 102, and outside air can sequentially pass through the motor seat 51, the bag seat 13 and an air inlet channel (usually a through hole) on the valve seat 12, and then enter the air inlet cavity 102; the outside air may also directly enter the air intake cavity from the air intake channel of the cover 11, as shown in fig. 1, the cover 11 is provided with an air intake pipe 111 and an air exhaust pipe 112.

In some embodiments of the present invention, the cover 11, the valve seat 12, the capsule holder 13 and the motor seat 51 are all provided with a locking slot 81, a clamp 82 is provided in the locking slot 81, and two ends of the clamp 82 are provided with tightening arms 821, wherein one of the tightening arms 821 is pressed on the top of the cover 11, and the other one of the tightening arms 821 is pressed on the bottom of the motor seat 51. The components of the miniature air pump 100 are fastened together to form a whole body through the cooperation of the clamping groove 81 and the clamping hoop 82. It can be understood that the cover 11 and the valve seat 12, and the valve seat 12 and the bag seat 13 can be matched by a connection method of the positioning column and the positioning hole or by an ultrasonic welding technology.

In the description of the present invention, it is to be understood that the terms "center", "length", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A micro air pump, comprising:

the pump body assembly comprises a cover body, a valve seat and a bag seat which are sequentially and hermetically connected from top to bottom, wherein the cover body and the valve seat jointly form an exhaust cavity;

a bladder sandwiched between a valve seat and the bladder seat, the bladder having a bladder cavity that pumps gas;

the exhaust valve group is attached to the top surface of the valve seat and used for controlling the on-off of exhaust holes in the valve seat, a plurality of exhaust valve plates are integrated in the exhaust valve group, and a positioning structure is arranged at the center positions of the exhaust valve group and the valve seat and comprises an I-shaped positioning column and an I-shaped positioning groove which are matched with each other;

the driving assembly comprises a motor base and a motor connected to the motor base, and the motor base is connected with the lower side of the capsule seat;

the connecting rod assembly is arranged in the motor base and in the installation space limited by the bag base, and comprises a connecting rod, a steel needle and an eccentric wheel which are sequentially connected, the connecting rod is connected with the bag body, the eccentric wheel is connected with a shaft of the motor, and the steel needle is connected with the eccentric wheel and the connecting rod.

2. The miniature air pump of claim 1 wherein said positioning structure and said exhaust valve set are both axisymmetric structures, and the central axis of said positioning structure is parallel to the diagonal of said exhaust valve set.

3. The micro air pump according to claim 1, wherein the exhaust valve set comprises a body and a plurality of exhaust valve plates formed on the circumference of the body, and each exhaust valve plate corresponds to one exhaust hole.

4. The micro air pump as claimed in claim 3, wherein a support rib is provided between adjacent discharge valve plates, the root of each discharge valve plate is connected to the body, a connecting wall is formed on the periphery of each discharge valve plate, and the connecting wall is connected to the support ribs on both sides.

5. The micro air pump according to claim 4, wherein the thickness of the connection wall is smaller than that of the discharge valve sheet.

6. The micro air pump according to claim 3, wherein a plurality of flow dividing blocks are provided at the top of the body, and the flow dividing blocks are spaced apart to form a flow dividing passage.

7. The micro air pump according to claim 1, wherein the discharge valve block is an integrally formed rubber member.

8. The micro air pump according to claim 1, wherein the bag body is formed with a plurality of bag cavities, the air inlet hole of the valve seat corresponds to each bag cavity in the vertical direction, and the bottom surface of the valve seat is provided with an air inlet valve plate for selectively controlling the on-off of the air inlet hole.

9. The miniature air pump according to claim 1, wherein said cover, said valve seat, said bag holder and said motor base are provided with a clamping groove, a clamping hoop is provided in said clamping groove, and two ends of said clamping hoop are provided with tightening arms, one of said tightening arms is pressed on the top of said cover, and the other one of said tightening arms is pressed on the bottom of said motor base.