阅读说明：本技术 一种静音的排气结构及相应的微型气泵 (Mute exhaust structure and corresponding miniature air pump ) 是由 江沛杰 李辉 赵仲康 于 2020-12-15 设计创作，主要内容包括：本分案申请提供一种静音的排气结构及相应的微型气泵,静音的排气结构包括泵壳和出气阀体,泵壳包括气体排出座和阀固定座,气体排出座和阀固定座之间连接形成阀腔,阀固定座上设置有连通阀腔和出气腔的出气通孔,气体排出座上设置有连通阀腔和外部空间的出气开口,出气阀体连接在出气通孔上,用于控制单向出气,出气阀体的一端设置有用于与出气通孔连接的连接孔,另一端设置有长条形的出气孔,出气腔的气体通过出气阀体的出气孔压出至外部空间,出气阀体能通过收缩以自动封闭出气孔。静音的排气结构通过本身收缩自动封闭出气孔,排气效率高,反向密封效果好,且噪音小。(This division application provides an exhaust structure and corresponding miniature air pump of silence, the exhaust structure of silence includes pump case and air outlet valve body, the pump case includes gas outgoing seat and valve fixing base, connect between gas outgoing seat and the valve fixing base and form the valve pocket, be provided with the air outlet through-hole of intercommunication valve pocket and air outlet cavity on the valve fixing base, be provided with the air outlet opening of intercommunication valve pocket and exterior space on the gas outgoing seat, air outlet valve body coupling is on the air outlet through-hole, be used for controlling one-way giving vent to anger, air outlet valve body's one end is provided with the connecting hole that is used for being connected with the air outlet through-hole, the other end is provided with the venthole of rectangular shape, the gas of air outlet cavity extrudes to exterior space through air outlet valve body's venthole, air outlet valve body can be through the shrink with self-sealing venthole. The mute exhaust structure has the advantages that the air outlet is automatically sealed through self contraction, the exhaust efficiency is high, the reverse sealing effect is good, and the noise is low.)

1. A silent exhaust structure is characterized by comprising

The pump shell comprises a gas discharge seat and a valve fixing seat, the gas discharge seat and the valve fixing seat are connected to form a valve cavity, the valve fixing seat is provided with a gas outlet through hole communicated with the valve cavity and a gas outlet cavity, and the gas discharge seat is provided with a gas outlet opening communicated with the valve cavity and an external space;

the gas outlet valve body is connected to the gas outlet through hole and used for controlling one-way gas outlet, one end of the gas outlet valve body is provided with a connecting hole used for being connected with the gas outlet through hole, the other end of the gas outlet valve body is provided with a strip-shaped gas outlet hole, gas in the gas outlet cavity is extruded to an external space through the gas outlet hole of the gas outlet valve body, and the gas outlet valve body can automatically close the gas outlet hole through contraction;

inclined planes are arranged on two sides of the air outlet valve body, the two inclined planes are respectively positioned on two sides of the length direction of the air outlet hole, so that the air outlet valve body can close the air outlet hole under the pressure of air pressure, and a crease is arranged on the inclined plane of the air outlet valve body, so that the air outlet valve body contracts along the crease to automatically close the air outlet hole;

the air outlet valve is characterized in that a plurality of strip-shaped creases are distributed on the inclined surface, the extending direction of the creases is approximately perpendicular to the air outlet direction of the air outlet valve body, and the depths of the creases are gradually reduced along the air outlet direction of the air outlet valve body.

2. The silent exhaust structure according to claim 1, wherein said pump case further comprises a fixed frame provided on said gas exhaust seat;

when the air outlet cavity exhausts air through the air outlet hole, the fixed frame is away from the periphery of the air outlet valve body by a set distance;

when the air outlet cavity presses air in through the air inlet through hole, the fixing frame extrudes the periphery of the air outlet valve body, so that the air outlet valve body contracts and seals the air outlet hole.

3. The silent exhaust structure according to claim 2, wherein the fixing frame includes a frame body and an elastic body, the elastic body is connected between the frame body and the gas exhaust seat, the frame body includes a first annular ring, a second annular ring and a connecting rod connected between the first annular ring and the second annular ring, the first annular ring is configured to contact with an outer periphery of the exhaust valve body, the elastic body is wrapped and connected outside the second annular ring, and a connecting groove for fixedly connecting the elastic body is provided on the gas exhaust seat.

4. The silent exhaust structure according to claim 1, further comprising a slip ring, a slider, and a connecting frame;

bosses are arranged around the air outlet through holes, the connecting frame is connected with the bosses in a sliding mode, the sliding direction of the connecting frame is consistent with the axial direction of the air outlet through holes, and the connecting holes of the air outlet valve body are connected with the connecting frame;

the valve fixing seat is provided with a mounting groove, a radial sliding groove and an axial sliding groove, the mounting groove is used for mounting the connecting frame, the axial sliding groove is distributed around the mounting groove, the radial sliding groove is communicated between the axial sliding groove and the mounting groove, the sliding ring is arranged in the axial sliding groove in a sliding manner, and the sliding block is arranged in the radial sliding groove in a sliding manner;

the gas exhaust seat is provided with an elastic column, and the elastic column is used for extruding the gas outlet valve body to enable the gas outlet valve body to be arranged in the mounting groove;

when the driving end in the air outlet cavity moves towards the direction far away from the valve cavity, the sliding ring slides and extrudes the sliding block, so that the sliding block extrudes the connecting frame to slide towards the direction close to the fixed frame, and the periphery of the air outlet valve body is extruded with the fixed frame.

5. The silent exhaust structure according to claim 4, wherein a protrusion for pressing the sliding block to slide is disposed inside the sliding ring, a position-avoiding groove corresponding to the protrusion is disposed on the valve fixing seat for mounting the sliding ring, the protrusion slides into the axial sliding groove through the position-avoiding groove, and the protrusion slides into the radial sliding groove by rotating the sliding ring.

6. A micro air pump using the silent exhaust structure of any one of claims 1 to 5, further comprising:

a cylinder fixing seat;

the swing rod assembly is movably arranged in the cylinder cavity and comprises a driving end, an air inlet through hole is formed in the driving end, the driving end divides the cylinder cavity of the pump shell into an air inlet cavity and an air outlet cavity, the air inlet cavity is communicated with the air outlet cavity through the air inlet through hole, an air inlet opening is further formed in the pump shell, and the air inlet opening is communicated with the air inlet cavity and an external space;

the motor is connected with the swing rod assembly through an eccentric wheel and used for providing power for the swing rod assembly; and

the air inlet valve body is of an elastic cylindrical structure, one end of the air inlet valve body is externally wrapped and connected with the driving end, the air inlet valve body comprises an air inlet valve plate for movably sealing the air inlet through hole, and the driving end movably presses external air into the air outlet cavity through the air inlet valve and presses the air in the air outlet cavity out of the air outlet cavity through the air outlet valve body;

the long screw runs through the gas exhaust seat, the valve fixing seat and the air cylinder fixing seat and is fixedly connected with the motor fixing seat, and the air inlet valve body is locked between the valve fixing seat and the air cylinder fixing seat.

7. The micro air pump according to claim 6, wherein the air intake valve body is an elastic cylindrical structure;

the swing rod assembly further comprises a rod body, a plurality of driving ends are distributed on the periphery of one end of the rod body, the other end of the rod body is connected with the eccentric wheel, the driving ends are connected with the air inlet valve body, the rod body is at a set inclination angle relative to a rotating shaft of the motor, the plurality of driving ends are located at different height positions, and the motor drives the rod body to swing so that the driving ends swing up and down to control air inlet and air outlet of the silent air pump;

the sliding ring is close to the one end of air inlet valve body is provided with the connecting wire, be close to in the air inlet valve body the connecting terminal is provided with on the surface of drive end, the connecting wire with connecting terminal sliding connection, the tip of connecting wire is followed air outlet valve body with wear out to the outside between the gas outgoing seat, just the connecting wire is fixed air outlet valve body with between the gas outgoing seat.

8. The micro air pump according to claim 7, wherein the silent air pump further comprises an adapter frame, a plurality of connecting wires are connected to the slip ring, the adapter frame is detachably connected to the inner surface of the air inlet valve body, the connecting terminals are disposed on the adapter frame, the ends of the connecting wires penetrate out from the same end of the adapter frame, and the ends of the connecting wires penetrate out from between the air outlet valve body and the air outlet seat.

9. The miniature air pump according to claim 8, wherein said connection terminal comprises a first ring body and a second ring body, one end of said first ring body is connected to said adapter frame, the other end of said first ring body is provided with a first curved portion bent inward, one end of said second ring body is connected to said adapter frame, the other end of said second ring body is provided with a second curved portion bent inward, and said first curved portion and said second curved portion are butted to form a gap for said connection line to enter the inside of said connection terminal.

10. The micro air pump according to claim 7, further comprising an elastic rubber block, wherein the connecting line penetrates through the elastic rubber block to form a sliding connection, and the elastic rubber block is pressed and fixed between the air outlet valve body and the valve fixing seat;

the tip of connecting wire is provided with the bigger end of cross-sectional area be provided with the pivot on the side of valve fixing base, it is used for convoluteing to rotate in the pivot be connected with the reel of connecting wire, be provided with on the reel and be used for the card to fix the draw-in groove of end, the reel with be provided with the elastic washer between the side of valve fixing base, the outer end threaded connection of pivot has nut spare, the nut spare is used for the extrusion the reel is in order to restrict its rotation.

Technical Field

The invention relates to the field of air pumps, in particular to a silent exhaust structure and a corresponding miniature air pump.

Background

The miniature air pump is a gas conveying device which has small volume, is provided with a gaseous working medium and is mainly used for multiple purposes such as gas sampling, gas circulation, vacuum adsorption, vacuum pressure maintaining, air exhaust, inflation, pressurization and the like. The air pump on the existing market is various, and the air pump generally comprises a power assembly, a piston cylinder assembly, an air inlet valve body, an air outlet valve body and a plurality of corresponding fixing seats, wherein the power assembly drives and controls air to enter in a single direction through the air inlet valve body, and air is discharged in a single direction through the air outlet valve body. The structure of the air pump in the prior art is different, the air inlet valve body and the air outlet valve body of the air pump generally adopt one-way valve plates, the structures are rough, and the problems in various aspects, such as low air inlet and outlet accuracy, high noise and the like, exist.

Therefore, it is necessary to provide a micro air pump to solve the above technical problems.

Disclosure of Invention

The invention provides a silent exhaust structure and a corresponding miniature air pump, which are used for solving the problems of low air inlet and outlet precision, high noise and the like of the air pump in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows: a silent exhaust structure comprises

The pump shell comprises a gas discharge seat and a valve fixing seat, the gas discharge seat and the valve fixing seat are connected to form a valve cavity, the valve fixing seat is provided with a gas outlet through hole communicated with the valve cavity and a gas outlet cavity, and the gas discharge seat is provided with a gas outlet opening communicated with the valve cavity and an external space;

the gas outlet valve body is connected to the gas outlet through hole and used for controlling one-way gas outlet, one end of the gas outlet valve body is provided with a connecting hole used for being connected with the gas outlet through hole, the other end of the gas outlet valve body is provided with a strip-shaped gas outlet hole, gas in the gas outlet cavity is extruded to an external space through the gas outlet hole of the gas outlet valve body, and the gas outlet valve body can automatically close the gas outlet hole through contraction;

inclined planes are arranged on two sides of the air outlet valve body, the two inclined planes are respectively positioned on two sides of the length direction of the air outlet hole, so that the air outlet valve body can close the air outlet hole under the pressure of air pressure, and a crease is arranged on the inclined plane of the air outlet valve body, so that the air outlet valve body contracts along the crease to automatically close the air outlet hole;

the air outlet valve is characterized in that a plurality of strip-shaped creases are distributed on the inclined surface, the extending direction of the creases is approximately perpendicular to the air outlet direction of the air outlet valve body, and the depths of the creases are gradually reduced along the air outlet direction of the air outlet valve body.

In the present invention, the pump case further includes a fixing frame provided on the gas exhaust seat;

when the air outlet cavity exhausts air through the air outlet hole, the fixed frame is away from the periphery of the air outlet valve body by a set distance;

when the air outlet cavity presses air in through the air inlet through hole, the fixing frame extrudes the periphery of the air outlet valve body, so that the air outlet valve body contracts and seals the air outlet hole.

The fixed frame comprises a frame body and an elastic body, wherein the elastic body is connected between the frame body and the gas discharge seat, the frame body comprises a first annular ring, a second annular ring and a connecting rod connected between the first annular ring and the second annular ring, the first annular ring is used for contacting with the periphery of the gas discharge valve body, the elastic body is wrapped and connected to the outside of the second annular ring, and a connecting groove used for fixedly connecting the elastic body is formed in the gas discharge seat.

In the invention, the exhaust structure further comprises a slip ring, a sliding block and a connecting frame;

bosses are arranged around the air outlet through holes, the connecting frame is connected with the bosses in a sliding mode, the sliding direction of the connecting frame is consistent with the axial direction of the air outlet through holes, and the connecting holes of the air outlet valve body are connected with the connecting frame;

the valve fixing seat is provided with a mounting groove, a radial sliding groove and an axial sliding groove, the mounting groove is used for mounting the connecting frame, the axial sliding groove is distributed around the mounting groove, the radial sliding groove is communicated between the axial sliding groove and the mounting groove, the sliding ring is arranged in the axial sliding groove in a sliding manner, and the sliding block is arranged in the radial sliding groove in a sliding manner;

the gas exhaust seat is provided with an elastic column, and the elastic column is used for extruding the gas outlet valve body to enable the gas outlet valve body to be arranged in the mounting groove;

when the driving end in the air outlet cavity moves towards the direction far away from the valve cavity, the sliding ring slides and extrudes the sliding block, so that the sliding block extrudes the connecting frame to slide towards the direction close to the fixed frame, and the periphery of the air outlet valve body is extruded with the fixed frame.

Furthermore, a convex block used for extruding the sliding block to slide is arranged on the inner side of the sliding ring, a position avoiding groove corresponding to the convex block is arranged on the valve fixing seat and used for installing the sliding ring, the convex block slides into the axial sliding groove through the position avoiding groove, and the convex block slides into the radial sliding groove through rotating the sliding ring.

The invention also includes a micro air pump using the silent exhaust structure, the micro air pump further includes:

a cylinder fixing seat;

the swing rod assembly is movably arranged in the cylinder cavity and comprises a driving end, an air inlet through hole is formed in the driving end, the driving end divides the cylinder cavity of the pump shell into an air inlet cavity and an air outlet cavity, the air inlet cavity is communicated with the air outlet cavity through the air inlet through hole, an air inlet opening is further formed in the pump shell, and the air inlet opening is communicated with the air inlet cavity and an external space;

the motor is connected with the swing rod assembly through an eccentric wheel and used for providing power for the swing rod assembly; and

the air inlet valve body is of an elastic cylindrical structure, one end of the air inlet valve body is externally wrapped and connected with the driving end, the air inlet valve body comprises an air inlet valve plate for movably sealing the air inlet through hole, and the driving end movably presses external air into the air outlet cavity through the air inlet valve and presses the air in the air outlet cavity out of the air outlet cavity through the air outlet valve body;

the long screw runs through the gas exhaust seat, the valve fixing seat and the air cylinder fixing seat and is fixedly connected with the motor fixing seat, and the air inlet valve body is locked between the valve fixing seat and the air cylinder fixing seat.

In the invention, the air inlet valve body is an elastic cylindrical structure;

the swing rod assembly further comprises a rod body, a plurality of driving ends are distributed on the periphery of one end of the rod body, the other end of the rod body is connected with the eccentric wheel, the driving ends are connected with the air inlet valve body, the rod body is at a set inclination angle relative to a rotating shaft of the motor, the plurality of driving ends are located at different height positions, and the motor drives the rod body to swing so that the driving ends swing up and down to control air inlet and air outlet of the silent air pump;

the sliding ring is close to the one end of air inlet valve body is provided with the connecting wire, be close to in the air inlet valve body the connecting terminal is provided with on the surface of drive end, the connecting wire with connecting terminal sliding connection, the tip of connecting wire is followed air outlet valve body with wear out to the outside between the gas outgoing seat, just the connecting wire is fixed air outlet valve body with between the gas outgoing seat.

The mute air pump further comprises a switching frame, wherein the sliding ring is connected with a plurality of connecting wires, the switching frame is detachably connected to the inner surface of the air inlet valve body, the connecting terminals are arranged on the switching frame, the end portions of the connecting wires penetrate out of the same end of the switching frame, and the end portions of the connecting wires penetrate out of the air outlet valve body and the air outlet seat.

Further, connecting terminal includes first ring body and second ring body, the one end of first ring body with the switching frame is connected, and the other end is provided with the first curved arc portion of inwards buckling, the one end of second ring body with the switching frame is connected, and the other end is provided with the second curved arc portion of inwards buckling, first curved arc portion with the butt joint of the curved arc portion of second forms and is used for the connecting wire gets into the inboard clearance mouth of connecting terminal.

In addition, the miniature air pump also comprises an elastic rubber block, the connecting line penetrates through the elastic rubber block to form sliding connection, and the elastic rubber block is pressed and fixed between the air outlet valve body and the valve fixing seat;

the tip of connecting wire is provided with the bigger end of cross-sectional area be provided with the pivot on the side of valve fixing base, it is used for convoluteing to rotate in the pivot be connected with the reel of connecting wire, be provided with on the reel and be used for the card to fix the draw-in groove of end, the reel with be provided with the elastic washer between the side of valve fixing base, the outer end threaded connection of pivot has nut spare, the nut spare is used for the extrusion the reel is in order to restrict its rotation.

Compared with the prior art, the invention has the beneficial effects that: the mute exhaust structure automatically seals the air outlet through self contraction, has high exhaust efficiency, good reverse sealing effect and low noise.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.

Fig. 1 is an exploded view of a micro air pump according to a first embodiment of the present invention.

Fig. 2 is a sectional view of a first embodiment of the micro air pump of the present invention.

Fig. 3 is a schematic structural view of an air outlet valve body in the first embodiment of the micro air pump of the present invention.

Fig. 4 is a schematic structural view of an intake valve body in the first embodiment of the micro air pump of the present invention.

Fig. 5 is a sectional view of a micro air pump according to a second embodiment of the present invention.

Fig. 6 is an enlarged view of a portion of the structure at X in fig. 5.

Fig. 7 is a schematic structural view of an air outlet valve body of a second embodiment of the micro air pump according to the present invention.

FIG. 8 is a schematic structural diagram of a fixing frame of a second embodiment of the micro air pump of the present invention.

Fig. 9 is a schematic structural view of a slip ring of a second embodiment of the micro air pump of the present invention.

FIG. 10 is a top view of an adaptor bracket of a second embodiment of the micro air pump of the present invention.

Fig. 11 is an enlarged view of a connection terminal on the adaptor rack of fig. 10.

Fig. 12 is a schematic structural view of a winding drum of a second embodiment of the micro air pump of the present invention.

Fig. 13 is an exploded view of a micro air pump according to a third embodiment of the present invention.

Fig. 14 is a sectional view of a micro air pump according to a third embodiment of the present invention.

Fig. 15 is a sectional view of a micro air pump according to a fourth embodiment of the present invention.

Fig. 16 is an enlarged view of a portion of the structure at Y in fig. 15.

Fig. 17 is a schematic structural view of an intake valve body of a fourth embodiment of the micro air pump of the present invention.

Fig. 18 is a schematic structural view of the vent of the fourth embodiment of the micro air pump of the present invention.

Fig. 19 is a schematic structural view of the elastic frame and the driving block of the fourth embodiment of the micro air pump of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom" are used only with reference to the orientation of the drawings, and the directional terms are used for illustration and understanding of the present invention, and are not intended to limit the present invention.

The terms "first," "second," and the like in the terms of the invention are used for descriptive purposes only and not for purposes of indication or implication relative importance, nor as a limitation on the order of precedence.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., the connection may be a detachable connection or a connection in a unitary structure; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The structure of the air pump in the prior art is different, the air inlet valve body and the air outlet valve body of the air pump generally adopt one-way valve plates, the structure is rough, and the problems in various aspects, such as low air inlet and outlet accuracy, high noise and the like, exist.

The following is a first embodiment of the micro air pump according to the present invention, which can solve the above technical problems.

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is an exploded schematic view of a first embodiment of a micro air pump of the present invention, fig. 2 is a cross-sectional view of the first embodiment of the micro air pump of the present invention, and fig. 3 is a schematic view of a structure of an air outlet valve body of the first embodiment of the micro air pump of the present invention.

In the drawings, elements having similar structures are denoted by the same reference numerals.

The invention provides a miniature air pump which comprises a pump shell, a swing rod assembly 12, a motor 13, an air outlet valve body 14 and an air inlet valve body 15.

The pump case includes valve pocket A and cylinder pocket, and the pump case specifically includes gas discharge seat 111, valve fixing base 112, cylinder fixing base 113 and motor fixing base 114, and long screw 16 runs through gas discharge seat 111, valve fixing base 112 and cylinder fixing base 113 and with motor fixing base 114 fixed connection, locks air inlet valve body 15 between valve fixing base 112 and cylinder fixing base 113 simultaneously, passes through screw 18 fixed connection between motor fixing base 114 and motor 13.

The swing rod assembly 12 is movably arranged in the air cylinder cavity, the swing rod assembly 12 comprises a driving end 121, an air inlet through hole 122 is formed in the driving end 121, the driving end 121 divides the air cylinder cavity into an air inlet cavity B1 and an air outlet cavity B2, the valve cavity A and the air outlet cavity B2 are communicated through an air outlet through hole 1121, the air inlet cavity B1 and the air outlet cavity B2 are communicated through the air inlet through hole 122, an air inlet opening 1141 and an air outlet opening 1111 are formed in the pump shell, the air outlet opening 1111 is communicated with the valve cavity A and an external space, and the air inlet opening 1141 is communicated with the air inlet cavity and the external space.

The motor 13 is connected with the swing rod assembly 12 through the eccentric wheel 17 to provide power for the swing rod assembly 12, the swing rod assembly 12 in this embodiment includes a rod body 123, one end of the rod body 123 is connected with the eccentric wheel 17, and a ball 19 is arranged between the rod body 123 and the eccentric wheel 17, so that the eccentric wheel 17 can better drive the rod body 123 to swing, the other end of the rod body 123 is connected with a disk body, three driving ends 121 are connected to the periphery of the disk body, the driving ends 121 are of a cylindrical structure, and a convex step 124 is arranged on the periphery of the driving ends, so that the connection with the air inlet valve body 15 is facilitated.

The air outlet valve body 14 is connected to the air outlet through hole 1121 for controlling one-way air outlet.

Referring to fig. 2 and 4, the intake valve body 15 is used for controlling one-way intake, the intake valve body 15 in this embodiment includes a cylinder portion 151, a flap portion 152 for interference connection with a driving end, and an intake valve sheet 153 for movably sealing the intake through hole 122, the driving end 121 movably presses external air into the outlet cavity B2 through the intake valve body 15, and presses the air in the outlet cavity B2 to the outside through the outlet valve body 14, the number of the intake valve bodies 15 corresponds to the number of the driving ends 121, and the plurality of intake valve bodies 15 are connected as an integral structure.

The cylinder fixing base 113 is provided with a positioning accommodating hole 1131 for positioning and arranging the intake valve body 15.

Wherein, the one end of the air outlet valve body 14 is provided with a connecting hole for connecting with the air outlet through hole 1121, and the periphery of the end is provided with a flange 142, the inner side of the air outlet seat 111 is provided with a pressing convex part, when the air outlet seat 111 is fixedly connected with the valve fixing seat 112, the pressing convex part presses the flange 142 on the valve fixing seat 112, the other end is provided with a strip-shaped air outlet hole 141, when the driving end 121 moves towards the direction far away from the valve cavity a, the air outlet valve body 14 can automatically close the air outlet hole 141 by contraction, the exhaust efficiency is high, the reverse sealing effect is good, and the noise is low.

The working principle of the invention is as follows: the motor 13 rotates and drives the eccentric wheel 17 to rotate, then the driving end 121 on the peripheral side of the swing rod component 12 can be driven to swing up and down, when the driving end 121 moves upwards, the compression air inlet valve body 15 deforms, the air outlet hole 141 is flushed, so that air in the air outlet cavity B2 is extruded to the outside through the air outlet hole 141 of the air outlet valve body 14, when the driving end 121 moves downwards, the air outlet valve body 14 can automatically close the air outlet hole 141 through contraction, meanwhile, the air inlet valve plate 153 can be opened to press the outside air into the air outlet cavity B2 through the air inlet valve body 15, and the reciprocating circulation is used for air inlet or air outlet.

Thus, the process of controlling the air inlet and the air outlet by the micro air pump of the preferred embodiment is completed.

The air outlet valve body of the miniature air pump of the embodiment automatically seals the air outlet hole through self contraction, the air exhaust efficiency is high, the reverse sealing effect is good, and the noise is low.

The second embodiment of the micro air pump according to the present invention is provided to solve the above technical problems, wherein the same structural numerals as those in the first embodiment are the same in this embodiment, and the main structural difference is at X in fig. 5, so that other structures can still refer to fig. 1-4.

The invention provides a miniature air pump which comprises a pump shell, a swing rod assembly 12, a motor 13, an air outlet valve body 21 and an air inlet valve body 15.

The pump case includes valve pocket A and cylinder pocket, and the pump case specifically includes gas discharge seat 111, valve fixing base 112, cylinder fixing base 113 and motor fixing base 114, and long screw 16 runs through gas discharge seat 111, valve fixing base 112 and cylinder fixing base 113 and with motor fixing base 114 fixed connection, locks air inlet valve body 15 between valve fixing base 112 and cylinder fixing base 113 simultaneously, passes through screw 18 fixed connection between motor fixing base 114 and motor 13.

The swing rod assembly 12 is movably arranged in the cylinder cavity, the swing rod assembly 12 comprises a driving end 121, an air inlet through hole 122 is formed in the driving end 121, the driving end 121 divides the cylinder cavity into an air inlet cavity B1 and an air outlet cavity B2, the valve cavity A and the air outlet cavity B2 are communicated through an air outlet through hole 1121, the air inlet cavity B1 and the air outlet cavity B2 are communicated through the air inlet through hole 122, an air inlet opening 1211 and an air outlet opening 1111 are formed in the pump shell, the air outlet opening 1111 is communicated with the valve cavity A and an external space, and the air inlet opening 1211 is communicated with the air inlet cavity and the external space.

The motor 13 is connected with the swing rod assembly 12 through the eccentric wheel 17 to provide power for the swing rod assembly 12, the swing rod assembly 12 in the embodiment includes a rod body 123, one end of the rod body 123 is connected with the eccentric wheel 17, and a ball 19 is arranged between the rod body 123 and the eccentric wheel 17, so that the eccentric wheel 17 can better drive the rod body 123 to swing, the other end of the rod body 123 is connected with a disk body, three driving ends 121 are connected to the periphery of the disk body, the driving ends 121 are of a cylindrical structure, a convex step 124 is arranged on the periphery of the driving ends, and the driving ends are favorably positioned and wrapped with the air inlet valve body 15.

The air outlet valve body 21 is connected to the air outlet through hole 1121 for controlling one-way air outlet.

Referring to fig. 5, the intake valve body 15 is used for controlling one-way intake, the intake valve body 15 in this embodiment includes a cylinder portion 151, a flap portion 152 for interference connection with a driving end, and an intake valve plate 153 for movably sealing the intake through hole 122, the driving end 121 movably presses external air into the exhaust cavity B2 through the intake valve body 15, and presses air in the exhaust cavity B2 to the outside through the exhaust valve body 21, the number of the intake valve bodies 15 corresponds to the number of the driving ends 121, and the intake valve bodies 15 are connected as an integral structure.

The cylinder fixing base 113 is provided with a positioning accommodating hole 1131 for positioning and arranging the intake valve body 15.

Wherein, the one end of going out the air valve body 21 is provided with the connecting hole that is used for being connected with outlet vent hole 1121, and the other end is provided with the venthole 211 of rectangular shape, and when drive end 121 moved to the direction of keeping away from valve pocket A, it can be with self-sealing venthole 211 through the shrink to go out the air valve body 21, and exhaust efficiency is high, and reverse sealed effectual, and the noise is little.

Referring to fig. 7, in the present embodiment, the two inclined surfaces 213 are disposed on two sides of the air outlet valve body 21, so that the cross-sectional dimension of the air outlet valve body 21 is gradually reduced along the air outlet direction of the air outlet valve body 21, so that the upper end of the air outlet valve body 21 is in a flat structure as shown in fig. 7, and the two inclined surfaces 213 are respectively disposed on two sides of the length direction of the air outlet hole, so that the air outlet valve body 21 can be compressed by air to close the air outlet hole 211.

In this embodiment, a fold 214 is provided on the inclined surface 213 of the air outlet valve body 21, so that the air outlet valve body 21 contracts along the fold 214, and the air outlet hole 211 is automatically closed more stably.

Preferably, a plurality of strip-shaped creases 214 are distributed on the inclined plane 213, the extending direction of the creases 214 is substantially perpendicular to the air outlet direction of the air outlet valve body 21, and the depth of the creases 214 is gradually reduced along the air outlet direction of the air outlet valve body 21, as shown in fig. 6, because the cross section of the air outlet valve body 21 is substantially conical, the degree of bending deformation of the air outlet hole 211 is more serious, so that the depth of the creases far away from the air outlet hole 211 is deeper, the contraction degree is gradually changed, and the contraction sealing effect of the air outlet valve body 21 is better.

Be provided with strengthening rib 214 strip in the middle part of inclined plane 213, strengthening rib 214 strip is roughly perpendicular to crease 214, can avoid the regional great that collapses in middle part, avoids the shrink to pull inhomogeneous, and then influences the complete sealed of venthole 211.

In the present invention, the pump case includes a gas exhaust seat 111, a valve fixing seat 112, and a fixing frame 22;

the gas outlet seat 111 and the valve fixing seat 112 are connected to form a valve cavity a, the gas outlet opening 1111 is disposed on the gas outlet seat 111, the gas outlet through hole 1121 is disposed on the valve fixing seat 112, and the fixing frame 22 is disposed on the gas outlet seat 111.

When the driving end 121 is close to the valve cavity a, the fixing frame 22 is spaced from the outer circumference of the air outlet valve body 21 by a set distance, so that air can be exhausted through the air outlet hole 211 better.

When the driving end 121 is far away from the valve cavity a, the fixing frame 22 extrudes the periphery of the air valve body 21, so that the air valve body 21 contracts to close the air outlet hole 211, the effect of preventing the gas in the valve cavity a from flowing back and sealing reversely is good, and the air inlet and exhaust accuracy is higher.

Specifically, referring to fig. 6, the micro air pump further includes a slip ring 24, a slider 25 and a connecting frame 23.

A boss 1122 is provided around the air outlet through hole 1121, the connecting frame 23 is slidably connected to the boss 1122, the sliding direction is the same as the axial direction of the air outlet through hole 1121, and the connecting hole of the air outlet valve body 21 is connected to the connecting frame 23.

The valve fixing seat 112 is provided with a mounting groove, a radial sliding groove and an axial sliding groove, the mounting groove is used for mounting the connecting frame 23, the axial sliding groove is distributed around the periphery of the mounting groove, the radial sliding groove is communicated between the axial sliding groove and the mounting groove, a sliding ring 24 is arranged in the axial sliding groove in a sliding manner, and a sliding block 25 is arranged in the radial sliding groove in a sliding manner;

referring to fig. 9, a protrusion 241 for pressing the sliding block 25 to slide is disposed inside the sliding ring 24, a position-avoiding groove corresponding to the protrusion 241 may be disposed on the valve fixing base 112 for mounting the sliding ring 24, the protrusion 241 slides into the axial sliding groove through the position-avoiding groove, and after sliding into the axial sliding groove for a certain depth, the protrusion 241 slides into the radial sliding groove by rotating the sliding ring 24.

Of course, the slip ring 24 and the projection 241 may be provided as separate structures, and the two may be respectively mounted to the axial sliding groove and the radial sliding groove and then fixedly connected by bonding, welding, or the like.

When the driving end moves in the direction far away from the valve cavity, the sliding ring 24 slides to extrude the sliding block 25, so that the sliding block 25 extrudes the connecting frame 23 to slide in the direction close to the fixed frame 22, and the periphery of the air valve body 21 is extruded with the fixed frame 22.

The periphery of the air outlet valve body 21 is provided with a flange 212, the air outlet seat 111 is provided with an elastic column 29, the elastic column 29 in the embodiment can be composed of a telescopic column and a spring sleeved outside the telescopic column, and the elastic column 29 is used for extruding the flange 212 of the air outlet valve body 21 to enable the air outlet valve body 21 to be arranged in the installation groove.

It should be noted that the connecting frame 23 is made of hard rubber with a certain deformation capability, and preferably has a structure with loose small holes inside, so that the slider 25 can extrude the connecting frame 23 to deform and move upward, so that the connecting frame 23 can always keep a better sealing condition with the inner wall of the mounting groove, and form a certain deformation, and meanwhile, the periphery of the air outlet valve body 21 in the embodiment is always close to a contact state with the fixed frame 22 in an ideal state, i.e. a small distance is formed, for example, an air pump with a pump shell diameter of 15-50mm, the periphery of the air outlet valve body 21 is within about 1mm from the fixed frame 22, and when the connecting frame 23 is driven to move upward, the periphery of the air outlet valve body 21 can be further extruded with the fixed frame 22, so that the air outlet valve body 21 deforms and contracts, thereby sealing the air outlet hole 211.

In addition, the pump case also includes a cylinder fixing seat 113, the air intake valve body 15 is an elastic cylindrical structure, and the air intake valve body 15 is fixed between the cylinder fixing seat 113 and the valve fixing seat 112.

The swing rod assembly 12 further includes a rod body 123, the plurality of driving ends 121 are distributed on the periphery of one end of the rod body 123, the other end of the rod body 123 is connected with the eccentric wheel 17, the driving ends 121 are connected with the air intake valve 15, the rod body 123 is at a set inclination angle relative to the rotating shaft of the motor 13, the plurality of driving ends 121 are located at different height positions, and the motor 13 drives the rod body 123 to swing so that the driving ends 121 swing up and down to control air intake and air outlet of the micro air pump.

The connecting line 27 is arranged at one end of the slip ring 24 close to the air inlet valve body, and the connecting line 27 preferably has a certain elastic force, such as an elastic line with high strength and low deformation, so that when the air inlet valve body 15 descends to a set distance away from the lowest point, downward pulling force is generated on the slip ring 24, and further in the descending process of the air inlet valve body 15, the periphery of the air outlet valve body 21 can be rapidly extruded with the fixed frame 22 to rapidly seal the air outlet 211, and when the pressure of the early air outlet cavity B2 is low when the air inlet valve body 15 ascends, the air outlet valve body 21 gradually breaks away from the extrusion state with the fixed frame 22, and as the pressure of the air outlet cavity B2 gradually increases, the air outlet 211 can be opened to perform good air exhaust.

Be provided with connecting terminal 261 on the surface that is close to drive end 121 in the air intake valve body 15, connecting wire 27 and connecting terminal 261 sliding connection, the tip of connecting wire 27 is worn out to the outside between air outlet valve body 21 and the gas discharge seat 111, and connecting wire 27 fixes between air outlet valve body 21 and the gas discharge seat 111, the in-process that air intake valve body 15 moved can pull the sliding ring 24 through connecting wire 27 and remove, and then drive link 23 shifts up, makes the periphery and the fixed frame 22 extrusion that reach air valve body 21.

Specifically, the micro air pump in this embodiment further includes an adapter rack 26, the slip ring 24 is connected with a plurality of connection lines 27, the adapter rack 26 is detachably connected to the inner surface of the air inlet valve body 15, the connection terminal 261 is disposed on the adapter rack 26, the ends of the connection lines 27 penetrate out from the same end of the adapter rack 26, and the ends of the connection lines 27 penetrate out to the outside from between the air outlet valve body 21 and the air outlet seat 111.

Referring to fig. 10 and 11, the connection terminal 261 includes a first ring 2611 and a second ring 2612, one end of the first ring 2611 is connected to the adapter rack 26, the other end of the first ring is provided with a first curved arc portion bent inward, one end of the second ring 2612 is connected to the adapter rack 26, the other end of the second ring is provided with a second curved arc portion bent inward, and the first curved arc portion and the second curved arc portion are butted to form a gap 2613 used for the connection wire 27 to enter the connection terminal 261, so that the connection wire can be conveniently clamped into the connection terminal 261 and is not easy to slide out.

Wherein, be provided with buckle 154 on the admission valve body 15, buckle 154 can select the metal material, and intensity is high and durable, admission valve body 15 can integrated into one piece's parcel connect buckle 154, and adapter rack 26 can dismantle with buckle 154 and be connected.

Preferably, the micro air pump in this embodiment further includes an elastic rubber block 271, the connection line 27 penetrates through the elastic rubber block 271 to form a sliding connection, the elastic rubber block 271 is pressed and fixed between the air outlet valve body 21 and the valve fixing seat 112, so as to form a good seal, as shown in fig. 6, the middle portions of the top surface and the bottom surface of the elastic rubber block 271 are arc-shaped protrusion structures, and the air outlet valve body 21 and the valve fixing seat 112 are provided with concave portions corresponding to the arc-shaped protrusion structures, so that the elastic rubber block 271 can be positioned and pressed and fixed between the air outlet valve body 21 and the valve fixing seat 112.

The connecting wire 27 is generally longer, so that the adapter frame 26 and the air inlet valve body 15 can be fixedly connected conveniently, meanwhile, before the air outlet valve body 21 and the valve fixing seat 112 press and fix the elastic rubber block 271, the connecting wire 27 can be pulled to be tightened, and the connecting wire 27 with the excessive length can be wound on the winding drum 28.

Referring to fig. 12, an end of the connection line 27 having a larger cross-sectional area is disposed at an end of the connection line 27, a rotation shaft 2A is disposed on a side surface of the valve fixing seat 112, and a winding drum 28 for winding the connection line 27 is rotatably connected to the rotation shaft 2A, wherein, for convenience and clarity of fig. 12, the rotation shaft 2A is pulled out of the winding drum 28, a slot 281 for fastening the fastening end of the connection line 27 is disposed on the winding drum 28, the connection line 27 can be wound well after being fastened, an elastic washer 2C is disposed between the winding drum 28 and the side surface of the valve fixing seat 112, an outer end of the rotation shaft 2A is connected to a nut member 2B in a threaded manner, after the redundant connection line 27 is wound, the nut member 2B can be screwed to the rotation shaft 2A, and at this time, the nut member 2B can press the winding drum 28 to limit rotation of the winding drum 28.

In the invention, the fixed frame 22 comprises a frame body and an elastic body 223, the elastic body 223 is connected between the frame body and the gas exhaust seat 111, the frame body comprises a first annular ring 221, a second annular ring and a connecting rod 222 connected between the first annular ring 221 and the second annular ring, the first annular ring 221 is used for contacting with the periphery of the gas exhaust valve body 21, the elastic body 223 is wrapped and connected outside the second annular ring, and the gas exhaust seat 111 is provided with a connecting groove for fixedly connecting the elastic body 223, so that the gas exhaust of the gas outlet hole 211 is facilitated, and meanwhile, the detachable interference connection of the whole fixed frame 22 and the connecting groove of the gas exhaust seat 111 is facilitated.

The working principle of the micro air pump of the embodiment is as follows: the motor 13 rotates and drives the eccentric wheel 17 to rotate, then the driving end 121 on the peripheral side of the swing rod assembly 12 can be driven to swing up and down, in the descending process of the driving end 121, the adapter frame 26 goes down along with the connecting line 27, the connecting line 27 is pulled to pull the sliding ring 24 downwards, the connecting frame 23 is driven to move upwards, the periphery of the obtained air valve body 21 is extruded with the fixed frame 22, the obtained air valve body 21 contracts to close the air outlet hole 211, meanwhile, the air inlet valve plate 153 is opened to press external air into the air outlet cavity B2 through the air inlet valve body 15, the backflow of the air in the valve cavity A can be well prevented, the reverse sealing effect is good, and the air inlet and exhaust accuracy is higher;

in the ascending process of the driving end 121, the adapter frame 26 ascends along with the ascending, and meanwhile, the connecting line 27 is gradually loosened, when the pressure of the gas outlet cavity B2 in the early stage is lower when the gas inlet valve body 15 ascends, the gas outlet valve body 21 is gradually separated from the fixed frame 22 in an extrusion state, and the gas outlet hole 141 is opened along with the gradual increase of the pressure of the gas outlet cavity B2, so that the gas in the gas outlet cavity B2 is pressed out to the outside through the gas outlet hole 141 of the gas outlet valve body 14, and the gas is repeatedly circulated for gas inlet or outlet.

As follows, the third embodiment of the micro air pump according to the present invention is provided to solve the above technical problems, the air pump in this embodiment does not use an air outlet valve body, but the air inlet valve body is wrapped and connected at one end thereof to the connecting protrusion, so that the air pressure inside the air inlet valve body is increased, and the air is pressed out from the gap region between the air inlet valve body and the connecting protrusion, and the air pump has high exhaust efficiency, good reverse sealing effect, and low noise.

Referring to fig. 13 and 14, the present invention provides a micro air pump, which includes a pump housing, an air inlet valve 35, a swing link assembly 32 and a motor 33.

The pump case includes gas exhaust seat 311, cylinder fixing seat 312 and motor fixing seat 313, connects between gas exhaust seat 311 and the cylinder fixing seat 312 and forms the valve pocket, is provided with air outlet opening 3111 on gas exhaust seat 311, and the inboard of gas exhaust seat 311 is provided with connects convex part 3112, and long screw 36 runs through gas exhaust seat 311, cylinder fixing seat 312 and with motor fixing seat 313 fixed connection, locks the air intake valve body 35 between gas exhaust seat 311 and cylinder fixing seat 312 simultaneously.

The air intake valve body 35 is disposed between the air exhaust seat 311 and the cylinder fixing seat 312, and divides the valve cavity into an air intake cavity C1 and an air outlet cavity C2, the air outlet cavity C2 is communicated with the external space through an air outlet opening 3111, an air intake opening 3131 is disposed at the bottom of 313, the air intake opening 3131 is communicated with the air intake cavity C1 and the external space, an air cylinder cavity 351 is disposed inside the air intake valve body 35, an opening connected with the connecting protrusion 3112 is disposed at one end of the air intake valve body 35, and an air intake valve plate 352 is movably disposed at the other end of the air intake valve body.

The swing rod assembly 32 comprises a driving end 321 connected with the air inlet valve body 35, the air inlet valve bodies 35 form an integrated structure, the swing rod assembly 32 also comprises a plurality of driving ends 321 connected together, an air inlet through hole 322 communicated with the air inlet cavity and the cylinder cavity 351 is formed in the driving end 321, the air inlet through hole 322 is movably sealed by the air inlet valve plate 352 and used for controlling unidirectional air inlet, the air in the air inlet cavity C1 is pressed into the cylinder cavity 351 through the air inlet through hole 322 by the movement of the driving end 321, or the air in the cylinder cavity 351 is pressed out into the air outlet cavity C2 through a gap area between the air inlet valve body 35 and the connecting convex portion 3112.

The motor 33 is connected with the swing link assembly 32 through an eccentric wheel 34 for providing power for the swing link assembly 32.

According to the micro air pump, one end of the air inlet valve body 35 is connected with the connecting convex portion 3112 in a wrapping mode, the motor 33 rotates and drives the eccentric wheel 34 to rotate, then the driving end 321 on the peripheral side of the swing rod assembly 32 can be driven to swing up and down, the driving end 321 movably presses air in the air inlet cavity C1 into the air cylinder cavity 351 through the air inlet through hole 322, or presses air in the air cylinder cavity 351 into the air outlet cavity C2 through a gap area between the air inlet valve body 35 and the connecting convex portion 3112, and the micro air pump is high in exhaust efficiency, good in reverse sealing effect and low in noise.

The fourth embodiment of the micro air pump according to the present invention is provided as follows, wherein the same structural numerals as in the third embodiment are the same, and the main structural difference is at Y in fig. 15, so that other structures can still refer to fig. 13-14.

The invention provides a micro air pump which comprises a pump shell, an air inlet valve body 41, a swing rod assembly 32 and a motor 33.

Referring to fig. 13, 15 and 16, the pump housing of the present embodiment includes a gas exhaust seat 311, a cylinder fixing seat 312 and a motor fixing seat 313, the gas exhaust seat 311 and the cylinder fixing seat 312 are connected to form a valve cavity, a gas outlet 3111 is disposed on the gas exhaust seat 311, a connecting protrusion 3112 is disposed on the inner side of the gas exhaust seat 311, and a long screw 36 penetrates through the gas exhaust seat 311 and the cylinder fixing seat 312 and is fixedly connected to the motor fixing seat 313, and simultaneously locks the gas inlet valve 41 between the gas exhaust seat 311 and the cylinder fixing seat 312.

The air intake valve body 41 is disposed between the air exhaust seat 311 and the cylinder fixing seat 312, and divides the valve cavity into an air intake cavity C1 and an air outlet cavity C2, the air outlet cavity C2 is communicated with the external space through an air outlet opening 3111, an air intake opening 3131 is disposed at the bottom of 313, the air intake opening 3131 is communicated with the air intake cavity C1 and the external space, the air cylinder cavity 411 is disposed inside the air intake valve body 41, an opening connected with the connecting protrusion 3112 is disposed at one end of the air intake valve body 41, and an air intake valve plate 415 is movably disposed at the other end of the air intake valve body 41.

The swing rod assembly 32 comprises a driving end 321 connected with the air inlet valve body 41, the plurality of air inlet valve bodies 41 form an integrated structure, the swing rod assembly 32 also comprises a plurality of driving ends 321 connected together, an air inlet through hole 322 communicated with the air inlet cavity and the cylinder cavity 411 is arranged on the driving end 321, the air inlet through hole 322 is movably sealed by the air inlet valve sheet 415 and used for controlling unidirectional air inlet, the air in the air inlet cavity C1 is pressed into the cylinder cavity 411 through the air inlet through hole 322 by the movement of the driving end 321, or the air in the cylinder cavity 411 is pressed into the air outlet cavity C2 through a gap area between the air inlet valve body 41 and the connecting convex part 3112, the exhaust efficiency is high, the reverse sealing effect is good, and the noise is small.

The motor 33 is connected with the swing link assembly 32 through an eccentric wheel 34 for providing power for the swing link assembly 32.

Referring to fig. 18, the micro air pump of the present embodiment further includes an air passage 42, the air passage 42 is slidably disposed in the cylinder cavity 411, and the air passage 42 is provided with an air transmission channel, wherein the driving end 321 is at an upper stop position when being closest to the air exhaust seat, and the driving end is at a lower stop position when being farthest from the air exhaust seat.

When the driving end moves to the set position in the upward stop movement direction, the air-bleed member 42 passes through the gap region, so that the cylinder chamber 411 communicates with the external space through the air delivery passage.

Further, the micro air pump further includes a driving assembly and an elastic member 43, the elastic member 43 is disposed between the air vent 42 and the connection protrusion 3112, the air vent 42 is provided with a connection portion 426 for connecting the elastic member 43, one side of the air vent 42 is provided with a pressure receiving portion 423, and the driving assembly is connected to the air intake valve body 41.

When the driving end moves to the set position in the upward stop movement direction, the driving assembly presses the pressed portion 423 to make the air vent 42 slide through the gap area, so that the gap area generates a gap through which air can flow out.

Preferably, as shown in fig. 18, a through groove 427 is provided on the inner wall of the vent 42 to penetrate vertically.

When the driving end moves to the upper stop position, the pressure receiving portion 423 is disconnected from the driving assembly, the elastic member 43 presses the vent member 42 to slide into the cylinder cavity 411, a seal is formed between the intake valve body 41 and the connecting protrusion 3112, and the clearance area is zero at this time, so that when the driving end 321 moves downward, a reverse seal is formed between the intake valve body 41 and the connecting protrusion 3112.

The elastic member 43 in this embodiment includes a spring and a tension line located inside the spring, one end of the tension line is connected to the connection protrusion 3112, the other end of the tension line is connected to the connection portion 426, the spring is compressed and connected between the connection protrusion 3112 and the connection portion 426, when the driving end 321 goes down to a certain position, the tension line can limit the air vent 42 to go down continuously, so that the driving block 44 of the driving assembly can go down and form a snap connection with the pressure receiving portion 423 again, and thus when the driving end 321 goes up, the driving assembly can drive the air vent 42 to move up.

Specifically, the ventilation member 42 includes ventilation bars 421 and a connection ring 422, the connection ring 422 is connected to one ends of the ventilation bars 421 close to the gas exhaust seat 311, a clearance groove 412 corresponding to the ventilation bar 421 is disposed at one end of the intake valve body 41 far from the connection protrusion 3112, the compression part 423 is disposed on the ventilation bar 421, and the gas transmission channel is disposed in the ventilation bar 421 and the connection ring 422.

When the driving end 321 moves to the upper stop position, the ventilation rod 421 slides into the avoiding groove 412, and the distance between the connection ring 422 and the clearance area is set, so that the connection ring 422 is separated from the clearance area immediately before the driving end 321 moves downwards, and a seal is formed between the intake valve body 41 and the connection protrusion 3112.

The air inlet 424 of the air transmission channel in this embodiment is disposed at a side of the air rod 421 facing away from the inner wall surface of the air inlet valve body 41, the air inlet 424 of this embodiment is located at the bottom end of the air rod 421, and the air outlet 425 of the air transmission channel is disposed at a side of the connecting ring 422 facing away from the avoiding groove 412.

Referring to fig. 16 and 17, the intake valve body 41 is an elastic cylindrical structure, the positioning groove is disposed on the periphery of the connecting protrusion 3112, the reinforcing rib 414 corresponding to the positioning groove is disposed on the intake valve body 41, so that the connection relationship between the intake valve body 41 and the connecting protrusion can be better maintained, the lateral outlet 413 is disposed on the intake valve body 41, when the driving end 321 moves to the upper stop position, the connecting ring 422 is disposed on the side of the reinforcing rib 414 close to the cylinder cavity 411, and the gas is output through the lateral outlet 413, and the connecting ring 422 starts to expand the gap area between the intake valve body 41 and the connecting protrusion 3112, so that the gas can be output more efficiently, and the gas transmission efficiency is high.

Referring to fig. 19, the driving assembly includes an elastic frame 45 and driving blocks 44 connected to the periphery of the elastic frame 45, and each driving block 44 is used for driving one ventilation bar 421.

When the driving end 321 moves to the upper stop position, the pressing portion presses the driving block 44 to be away from the pressure receiving portion 423, so that the air vent 42 slides into the cylinder cavity 411, specifically, the air vent rod 421 of the air vent 42 slides into the clearance groove 412 under the pressing of the elastic member 43.

When the driving end 321 moves to the lower stop position, under the elastic force of the elastic frame 45, the driving block 44 is clamped with the pressed part 423, so that the driving assembly can drive the ventilation piece 42 to move upwards when the driving end 321 moves upwards next time.

In this embodiment, a depressed groove 3113 is formed on a surface of the connection protrusion 3112 adjacent to the cylinder bore 411, the pressing portion is a slope surface formed on an inner wall of the depressed groove 3113, and the driving block 44 rotates by pressing the slope surface.

Referring to fig. 19, in particular, the elastic frame 45 in this embodiment includes a ring plate 451, a baffle 452 disposed on one side of the ring plate 451, and a spring 455 (the spring 455 is not all shown in fig. 19), the driving block 44 is rotatably disposed on the ring plate 451 and has a seat plate 454 for rotatably connecting the driving block 44 to the ring plate 451, the spring 455 is disposed between the driving block 44 and the baffle 452, the spring 455 is used for pressing the driving block 44 to rotate to engage with the pressure receiving portion 423, a screw passes through the ring plate 451 and the air intake valve body 41 to be fixedly connected to the driving end 321, and a through hole 456 for passing the screw is disposed on the ring plate 451.

A fixing groove 453 for positioning the connection spring 455 is provided on a side of the driving block 44 adjacent to the blocking plate 452, and the fixing groove 453 has a vertical size greater than that of the spring 455 in the orientation of fig. 19, so that the spring 455 has a certain adjustment space with respect to the fixing groove 453 when the driving block 44 rotates, and a fixing post for connecting with the spring 455 is provided on the blocking plate 452.

Further, a ball may be provided on the inclined surface, and a rubber layer 441 for contacting the ball is injection-molded on the driving block 44, so that the extrusion is more flexible and silent.

In the present invention, the gas exhaust seat is recessed from the outside to form an outer groove and an inner connecting protrusion 3112, the groove is provided to save material, and the silencing cotton 46 is filled in the groove to provide a silencing effect.

The working principle of the micro air pump of the embodiment is as follows: by connecting one end of the air inlet valve body 35 with the connecting convex portion 3112 in a wrapping manner, the motor 33 rotates and drives the eccentric wheel 34 to rotate, and then the driving end 321 on the peripheral side of the swing link assembly 32 can be driven to swing up and down,

referring to the view orientation of fig. 15, when the driving end 321 moves upward, the driving block 44 presses the pressure receiving portion 423 to drive the air venting member 42 to move upward, and the air venting member 42 slides through the gap area between the air intake valve body 35 and the connecting protrusion 3112, so that the gap area generates a gap through which air can flow out, and therefore air in the cylinder cavity 411 is exhausted, and the air exhausting is free of resistance and high in air exhausting efficiency.

When the driving end 321 moves to the upper stop position, the pressing portion presses the driving block 44 to make it far away from the pressed portion 423, the vent rod 421 slides into the avoiding groove 412 under the pressing of the elastic member 43 by the vent member 42, the connecting ring 422 is separated from the gap area, so that a seal is formed between the intake valve body 41 and the connecting protrusion 3112, and the intake valve plate 415 is opened while moving downwards, so that external air can be pressed into the cylinder cavity 411, and the air can be sucked or discharged in a reciprocating cycle manner.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.