Built-in electric air pump

1 . A built-in electric air pump adapted to be attached to an inflatable body, the built-in electric air pump comprising:

a pump housing defining therewithin an accommodating cavity;

a pump cover disposed within the accommodating cavity;

an impeller disposed on a first side of the pump cover;

a switching device disposed within the accommodating cavity;

an air valve in fluid communication with the switching device; and

an operating switch operably connected to the switching device and configured to drive the switching device to switch between a first position in which the built-in electric air pump is in an inflation state and a second position in which the built-in electric air pump is in an exhaust state; and

a press plate disposed within the accommodating cavity and comprising a first end biased to press against a first limiting structure of the pump cover, and a second end biased to press against the pump housing, such that the press plate and the pump housing limit a position of the pump cover within the accommodating cavity;

wherein the press plate divides the accommodating cavity into a first chamber and a second chamber independent of each other, wherein a driving device and the switching device are accommodated within the first chamber, and the second chamber is configured to accommodate an external power cable therewithin.

2 . The built-in electric air pump according to claim 1 , further comprising:

a motor disposed on a second side of the pump cover, opposite the first side, the motor configured to drive the impeller;

wherein the pump cover comprises an impeller cover, and the impeller is disposed in the first chamber defined by the pump housing and by the impeller cover.

3 . The built-in electric air pump according to claim 2 , wherein the air valve comprises a valve cover mounted on the pump housing by means of snap-fit.

4 . The built-in electric air pump according to claim 2 , wherein the pump cover is disposed at a bottom of the pump housing.

5 . The built-in electric air pump according to claim 1 wherein the pump cover comprises:

a switching cover and an impeller cover in fluid communication with the switching cover,

wherein the switching device is accommodated within the switching cover, the impeller is accommodated within the impeller cover, and the first limiting structure is disposed on the impeller cover.

6 . The built-in electric air pump according to claim 1 , wherein the first limiting structure is shaped to fit the first end of the press plate.

7 . The built-in electric air pump according to claim 1 , wherein:

the pump cover comprises a motor positioning post configured to engage the motor, and

the press plate comprises a pressing portion corresponding to the motor and biased to press the motor against the pump cover.

8 . The built-in electric air pump according to claim 1 , wherein the operating switch is mounted on the pump housing by means of snap-fit.

9 . The built-in electric air pump according to claim 1 , wherein

the press plate comprises a wiring groove configured to enable the external power cable to be connected to the driving device.

10 . The built-in electric air pump according to claim 1 , wherein

the pump housing comprises a shell having an opening therein and a panel configured to close the opening in the shell such that the shell and the panel together define the accommodating cavity; and

the panel comprises a panel body corresponding to the first chamber, and a flip cover corresponding to the second chamber, wherein the flip cover is pivotably attached to the panel body and comprises a buckle element configured to engage with the shell.

11 . The built-in electric air pump according to claim 10 , wherein the shell further comprises a second limiting structure that is provided on an inner wall thereof and being in contact with a lateral side of the press plate, such that the second limiting structure limits a position of the press plate within the accommodating cavity.

12 . The built-in electric air pump according to claim 1 , wherein:

the driving device further comprises a micro switch, and

the pump cover further comprises a switch positioning post and a switch buckle,

wherein the micro switch is engaged with the switch positioning post, and the switch buckle is configured to retain an engagement between the micro switch and the switch positioning post.

13 . The built-in electric air pump according to claim 1 , wherein:

when the switching device is in one of the first position and the second position, the switching device drives the air valve to be opened; and

when the switching device is in a third position, the air valve is closed.

14 . The built-in electric air pump according to claim 13 , further comprising:

a switching cover accommodating the switching device therein;

wherein the air valve comprises:

a valve stem,

a valve head disposed on an end of the valve stem, and

a return spring comprising a first end which abuts against the pump housing and a second end which abuts against the valve head,

wherein the switching device comprises a pusher;

wherein when the switching device moves in an axial direction of the switching cover to one of the first position and the second position, the pusher applies a force to the valve head to drive the air valve to be opened; and

when the switching device moves in the axial direction of the switching cover to the third position, the return spring drives the air valve to be closed.

15 . The built-in electric air pump according to claim 14 , wherein

the switching device comprises, formed in a wall surface thereof, an upper opening and a lower opening which are separated by the pusher;

the pump cover comprises:

an inflation path formed between the upper opening and the lower opening;

an exhaust path formed between the lower opening and the upper opening; and

when the switching device is in the third position, the upper opening and the lower opening are blocked by the pump cover.