CN214366790U

CN214366790U - Electric air pump

Info

Publication number: CN214366790U
Application number: CN202120046916.6U
Authority: CN
Inventors: 李啸雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-10-08
Anticipated expiration: 2031-01-08

Abstract

The utility model discloses an electric air pump, which comprises an outer shell provided with a shell air inlet and a shell air outlet, and a pump main body arranged in the outer shell; the shell air inlet and/or the shell air outlet are/is provided with sealing devices for sealing the corresponding air ports. The utility model discloses it has good leakproofness, prevents effectively that dust, liquid from getting into the inside electric influence that causes of electronic air pump inside to electronic air pump, reduces the potential safety hazard when electronic air pump uses and improves the life of electronic air pump.

Description

Electric air pump

Technical Field

The utility model belongs to the technical field of the air pump and specifically relates to an electronic air pump.

Background

The air pump is used for rapidly inflating various inflatable products (such as inflatable mattresses, inflatable toys, inflatable swimming pools for children, inflatable boats and the like) so as to realize inflation and expansion of the inflatable products for normal use.

The air inlet and the air outlet of the existing electric air pump are not provided with a protection device and are exposed outside; under the unused state, liquid, dust and the like can enter the interior of the electric air pump from the air inlet and the air outlet, so that the damage of an internal circuit and components of the electric air pump is caused, and the normal use of the electric air pump is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects existing in the prior art, the utility model provides an electric air pump, which has good sealing performance and greatly prolongs the service life of the electric air pump.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

an electric air pump comprises an outer shell provided with a shell air inlet and a shell air outlet, and a pump main body arranged in the outer shell; and the shell air inlet and/or the shell air outlet are/is provided with sealing devices for sealing the corresponding air ports.

By adopting the structure, the sealing device seals the shell air inlet and/or the shell air outlet when the electric air pump is not in use, so that dust and liquid are prevented from entering the electric air pump, the electric inside the electric air pump is influenced, the potential safety hazard when the electric air pump is used is reduced, and the service life of the electric air pump is prolonged.

Further, the sealing device comprises a first sealing device arranged at the air inlet of the shell, and the first sealing device comprises a sealing cover used for covering the air inlet of the shell; the sealing cover is detachably connected with the outer shell.

By adopting the structure, when the electric air pump is not used, a user can install the sealing cover on the outer shell and seal the air outlet of the shell; when the user needs to use the electric air pump, the user needs to detach the sealing cover from the outer shell to expose the shell air outlet.

Further, a first groove is formed in the outer shell at a groove provided with the shell air inlet, and the shell air inlet is arranged on the bottom surface of the first groove; the sealing cover is used for covering the end face of the shell air inlet and protrudes outwards to form an annular convex wall matched with the opening of the first groove; the outer wall surface of the annular convex wall is fixed with the inner wall of the first groove through threads.

By adopting the structure, when a user needs to fix the sealing cover on the outer shell, only one side with the annular convex wall is required to be aligned to the first groove, the sealing cover is rotated, and the sealing cover is fixed by utilizing the thread between the annular convex wall and the first groove so as to cover the shell air inlet on the bottom surface of the first groove; if the sealing cover needs to be detached from the outer shell, the sealing cover only needs to be rotated reversely.

Further, a bottom surface of the first groove forms a first seal ring installation groove for installing a first seal ring along the first groove side wall groove.

By adopting the structure, when the sealing cover is matched and installed with the first groove, the end part of the annular convex wall on the sealing cover can extrude the first sealing ring in the sealing installation groove, so that liquid and the like are prevented from entering from a thread fit gap between the annular convex wall and the first groove, and the sealing performance of the air inlet of the shell is further ensured.

Further, the first sealing means comprises a connecting member for connecting the sealing cover with the outer housing; one end of the connecting piece is connected with the sealing cover, and the other end of the connecting piece is connected with the outer shell.

By adopting the structure, the opened sealing cover depends on the connecting piece to be connected with the outer shell body, so that the opened sealing cover is prevented from being lost.

Furthermore, the sealing device comprises a second sealing device arranged at the air outlet of the shell, the second sealing device comprises a cover sheet matched with the air outlet of the shell and a cover sheet fixing member, one end of the cover sheet fixing member is connected with the cover sheet, the other end of the cover sheet fixing member is connected with the shell body, and at least the edge of the cover sheet in the second sealing device is made of soft materials.

By adopting the structure, when the electric air pump is not used, the edge of the covering sheet is attached and sealed with the air outlet of the shell because the covering sheet is matched with the air outlet of the shell, so that liquid and the like are prevented from entering the electric air pump; when the electric air pump is used, at least the edge of the covering sheet is made of soft materials, and the wind blown out from the air outlet of the shell enables the covering sheet to deform at least at the edge so that the covering sheet is separated from the air outlet of the shell, and the air outlet of the shell is opened; when the cover sheet is attached to the air outlet of the shell, the edge of the cover sheet is made of soft materials, so that the cover sheet can be deformed and tightly attached to the air outlet of the shell, and the sealing performance is further enhanced.

A fixed mounting hole for fixing the covering sheet fixing piece is formed in the center of the air outlet of the shell, and the edge of the fixed mounting hole is connected with the air outlet of the shell through a connecting rod; a fixed frustum is arranged at one end, connected with the outer shell, of the cover sheet fixing piece, the diameter of the top surface, far away from the cover sheet, of the fixed frustum is smaller than that of the fixed mounting hole, and the diameter of the bottom surface, close to the cover sheet, of the fixed frustum is larger than that of the fixed mounting hole; the end of the cover sheet fixing piece connected with the cover sheet is connected with the center of the cover sheet.

Specifically, the whole first sealing device is made of soft materials; more specifically, the soft material is rubber.

Further, the pump body comprises a pump body shell provided with a pump body air inlet and a pump body air outlet, an impeller structure arranged in the pump body shell, and a driving device for driving the impeller structure to rotate; the impeller structure comprises a wind collecting cover provided with an opening, a bottom plate and an air guide groove arranged between the wind collecting cover and the bottom plate.

The air outlet of the pump body and the air outlet of the shell are on the same straight line, and the opening of the air collecting cover and the air inlet of the pump body are on the same straight line.

By adopting the structure, the driving device drives the impeller structure to rotate, and outside air enters the outer shell through the shell air inlet and enters the pump main body through the pump body air inlet; the air entering the pump main body enters a cavity formed by the air collecting cover and the bottom plate from the air collecting cover, is discharged out of the impeller structure through the air guide groove, and inflates an inflatable product through the pump body air outlet and the shell air outlet.

The air collecting cover can reduce the space of air, improve the vacuum degree in the pump, improve the inflation efficiency of the air pump, and has low noise.

Specifically, the driving device adopts a motor, and a motor shaft is structurally connected with the impeller; the air guide grooves are spirally distributed.

Further, the pump main part is still including setting up in the pump casing body and being located impeller structure with ventilation seat between the drive arrangement, ventilation seat is provided with round air inlet along its circumference, the ventilation seat orientation the back of impeller structure's terminal surface be provided with the guide way of air inlet intercommunication, the guide way with the air inlet one-to-one matches the setting.

By adopting the structure, the air discharged by the impeller structure is dispersed from the airflow inlet of the ventilation seat and the guide groove and then discharged from the air outlet of the pump body and the air outlet of the shell; the ventilation seat can uniformly disperse air, so that noise caused by air oscillation is avoided; the wind passing through the ventilation seat can pass through the driving device in a vortex mode, so that the problem of heating of the driving device can be solved to a certain extent, and the service life of the motor is prolonged; the guide grooves are spirally distributed.

Further, the outer shell comprises a connecting seat and a shell cover, the shell air inlet is arranged on the connecting seat, and the shell air outlet is arranged on the shell cover; the connecting seat and the shell cover are fixed through screws, and the screw mounting position of the connecting seat is recessed to form a screw mounting groove; the screw mounting groove is provided with a sealing plug matched with the opening of the screw mounting groove;

and the contact part of the connecting seat and the shell cover is sunken to form a second sealing ring mounting groove for mounting a second sealing ring.

By adopting the structure, the sealing plug is arranged, so that liquid is prevented from entering the electric air pump from the mounting screw, and the sealing performance of the electric air pump is further ensured;

when the shell cover is installed on the connecting seat, the edge of the shell cover is in contact with the connecting seat, so that the edge of the shell cover extrudes the second sealing ring in the second sealing ring installation groove, liquid is prevented from entering the interior of the electric air pump from a slit between the connecting seat and the shell cover, and the sealing performance of the electric air pump is further ensured.

Furthermore, the shell protrudes outwards to form a first annular mounting seat, and the connecting piece is used for connecting one end of the shell and is provided with a first annular sleeving ring which is sleeved outside the first annular mounting seat in a matching manner; the end surface of the sealing cover, which does not cover the air inlet of the shell, protrudes outwards to form a second annular mounting seat, and one end of the connecting piece, which is used for connecting the sealing cover, is provided with a second annular sleeving ring which is sleeved outside the second annular mounting seat in a matching manner; first annular mount pad upper cover is equipped with first anticreep piece, first anticreep piece includes that the external diameter is greater than the first anticreep lid of ring internal diameter is established to first annular cover, second annular mount pad upper cover is equipped with second anticreep piece, second anticreep piece includes that the external diameter is greater than the second anticreep lid of ring internal diameter is established to second annular cover.

Adopt above-mentioned structure, first anticreep spare effectively prevents first annular cover is established the ring and is broken away from first annular mount pad, first anticreep spare including be used for install extremely on the first annular mount pad with first annular mount pad hole assorted first annular installation lug, first annular mount pad hole with it is fixed through screw thread, glue, hot melt welding etc. between the first annular installation lug.

The second anticreep piece effectively prevents the second annular cover is established the ring and is broken away from second annular mount pad, the second anticreep piece including be used for install extremely on the second annular mount pad with second annular mount pad hole assorted second annular installation lug, second annular mount pad hole with it is fixed through screw thread, glue, hot melt welding etc. between the second annular installation lug. And secondly, the electric air pump comprises a storage battery which is arranged in the outer shell and used for supplying power to the electric air pump.

Further, a switch for opening and closing the electric air pump and an electric connection port for connecting an external power line are arranged on the bottom surface of the first groove.

By adopting the structure, the sealing performance of the electric air pump is further ensured.

The electrical connection port may provide energy for operation of the pump body, as well as charge a battery.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses an it is provided with sealing device of electronic air pump, effectively prevents the inside that liquid dust etc. got into electronic air pump, has prolonged the life of electronic air pump greatly.

(2) The utility model discloses an electronic air pump is provided with other sealing measures such as first sealing washer, second sealing washer, sealing plug, prevents that liquid from getting into electronic air pump inside from the fit-up gap, further guarantees the leakproofness of electronic air pump.

(3) The utility model discloses a pump main part is provided with impeller structure, ventilation seat in the electronic air pump, greatly reduced the noise when electronic air pump moves.

Drawings

FIG. 1 is a schematic perspective view of an electric air pump according to the present invention;

FIG. 2 is a schematic view of the explosion structure of the electric air pump of the present invention;

FIG. 3 is a schematic view of an explosion structure of the pump body of the electric air pump of the present invention;

FIG. 4 is a schematic structural view of a ventilation seat in the electric air pump of the present invention;

FIG. 5 is a schematic sectional view of the electric air pump of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 5;

FIG. 7 is an enlarged view at B in FIG. 5;

FIG. 8 is an enlarged view at C of FIG. 5;

reference numerals: 1 an outer shell; 101 housing air inlet; 102 a housing air outlet; 103 a first groove; 104 a first seal ring mounting groove; 105 a connecting seat; 1051 screw mounting grooves; 1052 second seal ring mounting groove; 106 a shell cover; 107 a first annular mount; 2a pump body; 201 pump body housing; 2011 pump body intake; 2012 pump body air outlet; 202 impeller structure; 2021 wind collecting cover; 2022 a base plate; 2023 air guide groove; 203 driving means; 204 a ventilation seat; 2041 an airflow inlet; 2042 a guide groove; 3, sealing the device; 301 a first sealing means; 3011 sealing the lid; 3011a an annular convex wall; 3011b a second annular mount; 3012a connecting piece; 3012a first annular collar; 3012b a second annular sleeve ring; 302 a second sealing device; 3021 sealing the disc; 3022 sealing patch fixing member; 4, a first sealing ring; 5 a second sealing ring; 6, sealing a plug; 7 a first anti-slip element; 701, a first anti-dropping cover; 702 a first annular mounting lug; 8 a second anti-slip element; 801 second anti-drop cover; 802 second annular mounting lugs; 9 a storage battery; 10 switches; 11 are electrically connected to the ports.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 8, an electric air pump includes an outer casing 1 provided with a casing air inlet 101, a casing air outlet 102, and a pump main body 2 disposed inside the outer casing 1; the housing inlet 101 and/or the housing outlet 102 are provided with sealing means 3 to seal the respective ports.

By adopting the structure, the sealing device 3 seals the shell air inlet 101 and/or the shell air outlet 102 when the electric air pump is not in use, so that dust and liquid are prevented from entering the electric air pump, the electric inside the electric air pump is influenced, the potential safety hazard when the electric air pump is used is reduced, and the service life of the electric air pump is prolonged.

As shown in fig. 1, 2, 5 and 6, further, the sealing device 3 includes a first sealing device 301 disposed at the housing air inlet 101, and the first sealing device 301 includes a sealing cover 3011 for covering the housing air inlet 101; the sealing cover 3011 is detachably connected to the outer housing 1.

With the above structure, in a state where the electric air pump is not used, a user can mount the sealing cover 3011 to the outer housing 1 to seal the housing air outlet 102; when the user needs to use the electric air pump, the user needs to detach the sealing cover 3011 from the outer casing 1 to expose the casing air outlet 102.

As shown in fig. 5 and 6, further, the outer shell 1 is recessed to form a first recess 103 where the shell air inlet 101 is arranged, and the shell air inlet 101 is arranged at the bottom surface of the first recess 103; the sealing cover 3011 is used for covering the end face of the housing air inlet 101 and protrudes outwards to form an annular convex wall 3011a matched with the opening of the first groove 103; the outer wall surface of the annular convex wall 3011a and the inner wall of the first groove 103 are fixed by screw thread.

With the above structure, if a user needs to fix the sealing cover 3011 on the outer housing 1, only one side with the annular convex wall 3011a needs to be directed to the first groove 103, and the sealing cover 3011 is rotated, and the sealing cover 3011 is fixed by using the thread between the annular convex wall 3011a and the first groove 103 to cover the housing air inlet 101 on the bottom surface of the first groove 103; if the sealing cover 3011 needs to be detached from the outer shell 1, only the sealing cover 3011 needs to be rotated reversely.

As shown in fig. 6, further, the bottom surface of the first groove 103 forms a first gasket mounting groove 104 for mounting the first gasket 4 along the groove of the sidewall of the first groove 103.

With the structure, when the sealing cover 3011 is installed in cooperation with the first groove 103, the end of the annular convex wall 3011a on the sealing cover 3011 presses the first sealing ring 4 in the sealing installation groove, so as to prevent liquid and the like from entering from the thread fit gap between the annular convex wall 3011a and the first groove 103, and further ensure the sealing performance of the shell air inlet 101.

As shown in fig. 1 and 2, further, the first sealing device 301 includes a connecting piece 3012 for connecting the sealing cover 3011 with the outer shell 1; one end of the connecting piece 3012 is connected to the sealing cover 3011, and the other end is connected to the outer shell 1.

With the above structure, the opened sealing cover 3011 is connected to the outer casing 1 by the connecting piece 3012, so as to prevent the opened sealing cover 3011 from being lost.

As shown in fig. 1, 2 and 5, further, the sealing device 3 includes a second sealing device 302 disposed at the housing air outlet 102, the second sealing device 302 includes a sealing sheet 3021 matching the housing air outlet 102, and a sealing sheet fixing member 3022 having one end connected to the sealing sheet 3021, the other end of the sealing sheet fixing member 3022 is connected to the outer housing 1, and at least an edge of the sealing sheet 3021 in the second sealing device 302 is made of a soft material.

With the structure, when the electric air pump is not used, the sealing sheet 3021 is matched with the shell air outlet 102, so that the edge of the sealing sheet is attached to and sealed with the shell air outlet, and liquid and the like are prevented from entering the electric air pump; when the electric air pump is used, at least the edge of the sealing sheet 3021 is made of a soft material, and the air blown out from the air outlet of the housing deforms at least the edge of the sealing sheet 3021 so that the sealing sheet 3021 is separated from the air outlet of the housing, thereby opening the air outlet of the housing; when the sealing sheet 3021 is attached to the air outlet of the casing, the sealing sheet 3021 is made of soft materials, so that the sealing sheet 3021 can be deformed and tightly attached to the air outlet, and the sealing performance is further enhanced.

A fixed mounting hole for fixing the sealing sheet fixing piece 3022 is formed in the center of the shell air outlet, and the edge of the fixed mounting hole is connected with the shell air outlet through a connecting rod; a fixed frustum is arranged at one end, connected with the outer shell 1, of the sealing piece fixing piece 3022, the diameter of the top surface, away from the sealing piece 3021, of the fixed frustum is smaller than that of the fixed mounting hole, and the diameter of the bottom surface, close to the sealing piece 3021, of the fixed frustum is larger than that of the fixed mounting hole; the end of the seal piece fixing piece 3022 connected to the seal piece 3021 is connected to the center of the seal piece 3021.

Specifically, the whole first sealing device 301 is made of a soft material; more specifically, the soft material is rubber.

As shown in fig. 2 and 3, the pump main body 2 further includes a pump body housing 201 provided with a pump body air inlet 2011 and a pump body air outlet 2012, an impeller structure 202 arranged in the pump body housing 201, and a driving device 203 for driving the impeller structure 202 to rotate; the impeller structure 202 includes a wind-collecting cover 2021 provided with an opening, a bottom plate 2022, and an air-guiding groove 2023 provided between the wind-collecting cover 2021 and the bottom plate 2022.

The pump outlet 2012 and the housing outlet 102 are on the same straight line, and the opening of the air collection cover 2021 and the pump inlet 2011 are on the same straight line.

With the above structure, the driving device 203 drives the impeller structure 202 to rotate, and outside air enters the outer housing 1 through the housing air inlet 101 and enters the pump main body 2 through the pump body air inlet 2011; the air entering the pump main body 2 enters the cavity formed by the air collecting cover 2021 and the bottom plate 2022 from the air collecting cover 2021, and is discharged from the impeller structure 202 through the air guiding groove 2023, and inflates the inflating product through the pump body air outlet 2012 and the housing air outlet 102.

The air collecting cover 2021 can reduce the space of air, improve the vacuum degree in the pump, improve the inflation efficiency of the air pump, and has low noise.

Specifically, the driving device 203 adopts a motor, and a motor shaft is connected with the impeller structure 202; the wind guide groove 2023 is spirally distributed.

As shown in fig. 3 and 4, the pump main body 2 further includes a ventilation seat 204 disposed in the pump body housing 201 and located between the impeller structure 202 and the driving device 203, the ventilation seat 204 is provided with a circle of airflow inlets 2041 along the circumferential direction thereof, a guide groove 2042 communicated with the airflow inlets 2041 is disposed on the back surface of the end surface of the ventilation seat 204 facing the impeller structure 202, and the guide groove 2042 and the airflow inlets 2041 are correspondingly and correspondingly arranged one to one.

With the above structure, the air exhausted by the impeller structure 202 is dispersed from the airflow inlet 2041 and the guide groove 2042 of the ventilation seat 204 and then exhausted through the pump body air outlet 2012 and the housing air outlet 102; the ventilation seat 204 can uniformly disperse air, so that noise caused by air oscillation is avoided; the wind passing through the ventilation seat 204 can pass through the driving device 203 in a vortex mode, so that the problem of heating of the driving device 203 can be solved to a certain extent, and the service life of the motor is prolonged; the guide grooves 2042 are spirally distributed.

As shown in fig. 1 and 2, further, the outer casing 1 includes a connecting seat 105, and a casing cover 106, the casing air inlet 101 is disposed on the connecting seat 105, and the casing air outlet 102 is disposed on the casing cover 106; the connecting seat 105 and the shell cover 106 are fixed through screws, and the screw mounting position of the connecting seat 105 is recessed to form a screw mounting groove 1051; the screw mounting groove 1051 is provided with a sealing plug 6 matched with the opening of the screw mounting groove 1051;

the contact position of the connecting seat 105 and the shell cover 106 is recessed to form a second sealing ring installation groove 1052 for installing the second sealing ring 5.

By adopting the structure, the sealing plug 6 is arranged, so that liquid is prevented from entering the electric air pump from the mounting screw, and the sealing performance of the electric air pump is further ensured;

when the housing cover 106 is mounted on the connection seat 105, the edge of the housing cover 106 contacts the connection seat 105, so that the edge of the housing cover 106 presses the second seal ring 5 in the second seal ring mounting groove 1052, thereby preventing liquid from entering the interior of the electric air pump from a slit between the connection seat 105 and the housing cover 106, and further ensuring the sealing performance of the electric air pump.

As shown in fig. 1, 2, 5, 7, and 8, further, the housing protrudes outward to form a first annular mounting seat 107, and the connecting piece 3012 is used to connect one end of the housing and is provided with a first annular sleeving ring 3012a for sleeving the first annular mounting seat 107 in a matching manner; the end surface of the sealing cover 3011, which does not cover the air inlet 101 of the housing, protrudes outward to form a second annular mounting seat 3011b, and one end of the connecting piece 3012, which is used for connecting the sealing cover 3011, is provided with a second annular sleeving ring 3012b which is used for sleeving the second annular mounting seat 3011b in a matching manner; first annular mount pad 107 upper cover is equipped with first anticreep piece 7, first anticreep piece 7 includes that the external diameter is greater than first annular cover establishes the first anticreep lid 701 of ring 3012a internal diameter, second annular mount pad 3011b upper cover is equipped with second anticreep piece 8, second anticreep piece 8 includes that the external diameter is greater than the second anticreep lid 801 of ring 3012b internal diameter is established to the second annular cover.

Adopt above-mentioned structure, first anticreep piece 7 effectively prevents ring 3012a is established to first annular cover breaks away from first annular mount pad 107, first anticreep piece 7 including be used for the installation extremely on first annular mount pad 107 with first annular mount pad 107 hole assorted first annular installation lug 702, first annular mount pad 107 hole with it is fixed through screw thread, glue, hot melt welding etc. between the first annular installation lug 702.

The second anticreep piece 8 prevents effectively the second annular cover is established the ring 3012b and is broken away from second annular mount pad 3011b, second anticreep piece 8 including be used for the installation extremely on the second annular mount pad 3011b with second annular mount pad 3011b hole assorted second annular installation lug 802, second annular mount pad 3011b hole with it is fixed through screw thread, glue, hot melt welding etc. between the second annular installation lug 802. Further, the electric air pump comprises a storage battery 9 arranged in the outer shell 1 and used for supplying power to the electric air pump.

As shown in fig. 2, a switch 10 for opening and closing the electric air pump and an electrical connection port 11 for connecting an external power line are further disposed on a bottom surface of the first groove 103.

The electrical connection port 11 can both provide energy for the operation of the pump body 2 and charge the accumulator 9.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An electric air pump, characterized in that: comprises an outer shell (1) provided with a shell air inlet (101) and a shell air outlet (102), and a pump main body (2) arranged in the outer shell (1); and a sealing device (3) is arranged at the shell air inlet (101) and/or the shell air outlet (102) to seal the corresponding air ports.

2. The electric air pump according to claim 1, wherein: the sealing device (3) comprises a first sealing device (301) arranged at the housing air inlet (101), the first sealing device (301) comprises a sealing cover (3011) for covering the housing air inlet (101); the sealing cover (3011) is detachably connected with the outer shell (1).

3. The electric air pump according to claim 2, wherein: the outer shell (1) is provided with a shell air inlet (101) which is recessed to form a first groove (103), and the shell air inlet (101) is arranged on the bottom surface of the first groove (103); the sealing cover (3011) is used for covering the end face of the shell air inlet (101) and protrudes outwards to form an annular convex wall (3011a) matched with the opening of the first groove (103); the outer wall surface of the annular convex wall (3011a) and the inner wall of the first groove (103) are fixed in a threaded mode.

4. The electric air pump according to claim 3, wherein: the bottom surface of the first groove (103) forms a first sealing ring installation groove (104) for installing a first sealing ring (4) along the groove of the side wall of the first groove (103).

5. The electric air pump according to claim 2, wherein: the first sealing device (301) comprises a connecting piece (3012) for connecting the sealing cover (3011) and the outer shell (1); one end of the connecting piece (3012) is connected with the sealing cover (3011), and the other end of the connecting piece is connected with the outer shell (1).

6. The electric air pump according to claim 1, wherein: the sealing device (3) comprises a second sealing device (302) arranged at the air outlet (102) of the shell, the second sealing device (302) comprises a sealing sheet (3021) matched with the air outlet (102) of the shell and a sealing sheet fixing piece (3022) with one end connected with the sealing sheet (3021), the other end of the sealing sheet fixing piece (3022) is connected with the outer shell (1), and at least the edge of the sealing sheet (3021) in the second sealing device (302) is made of soft materials.

7. The electric air pump according to claim 1, wherein: the pump body (2) comprises a pump body shell (201) provided with a pump body air inlet (2011) and a pump body air outlet (2012), an impeller structure (202) arranged in the pump body shell (201), and a driving device (203) used for driving the impeller structure (202) to rotate; the impeller structure (202) comprises a wind collecting cover (2021) provided with an opening, a bottom plate (2022) and an air guide groove (2023) arranged between the wind collecting cover (2021) and the bottom plate (2022);

the pump body (2) is still including setting up in pump body casing (201) and be located impeller structure (202) with ventilation seat (204) between drive arrangement (203), ventilation seat (204) are provided with round air current import (2041) along its circumference, ventilation seat (204) orientation the back of the terminal surface of impeller structure (202) be provided with guide way (2042) of air current import (2041) intercommunication, guide way (2042) with air current import (2041) one-to-one matches the setting.

8. The electric air pump according to claim 1, wherein: the outer shell (1) comprises a connecting seat (105) and a shell cover (106), the shell air inlet (101) is arranged on the connecting seat (105), and the shell air outlet (102) is arranged on the shell cover (106); the connecting seat (105) and the shell cover (106) are fixed through screws, and the screw mounting position of the connecting seat (105) is sunken to form a screw mounting groove (1051); the screw mounting groove (1051) is provided with a sealing plug (6) matched with the opening of the screw mounting groove;

the contact part of the connecting seat (105) and the shell cover (106) is recessed to form a second sealing ring installation groove (1052) for installing a second sealing ring (5).

9. The electric air pump according to claim 5, wherein: the shell is outwards protruded to form a first annular mounting seat (107), and the connecting piece (3012) is used for being connected with one end of the shell and is provided with a first annular sleeving ring (3012a) which is sleeved outside the first annular mounting seat (107) in a matching manner; a second annular mounting seat (3011b) protrudes outwards from the end face, which does not cover the air inlet (101) of the shell, of the sealing cover (3011), and a second annular sleeving ring (3012b) which is sleeved outside the second annular mounting seat (3011b) is arranged at one end, used for being connected with the sealing cover (3011), of the connecting piece (3012) in a matching manner; first annular mount pad (107) upper cover is equipped with first anticreep piece (7), first anticreep piece (7) are greater than including the external diameter first anticreep lid (701) of ring (3012a) internal diameter are established to first annular cover, second annular mount pad (3011b) upper cover is equipped with second anticreep piece (8), second anticreep piece (8) are greater than including the external diameter second anticreep lid (801) of ring (3012b) internal diameter are established to second annular cover.

10. The electric air pump according to claim 5, wherein: the electric air pump comprises a storage battery (9) which is arranged in the outer shell (1) and used for supplying power to the electric air pump.

11. The electric air pump according to claim 3, wherein: the bottom surface of the first groove (103) is provided with a switch (10) for opening and closing the electric air pump and an electric connection port (11) for connecting an external power line.