US 12,253,074 B2
Electromagnetic air pump
Kao-Hung Lin, New Taipei (TW); and Kuan-Chih Chen, New Taipei (TW)
Assigned to WELLELL INC., New Taipei (TW)
Filed by Wellell Inc., New Taipei (TW)
Filed on Jun. 5, 2023, as Appl. No. 18/205,576.
Claims priority of application No. 111122101 (TW), filed on Jun. 14, 2022.
Prior Publication US 2023/0400020 A1, Dec. 14, 2023
Int. Cl. F04B 45/027 (2006.01)
CPC F04B 45/027 (2013.01) 9 Claims
OG exemplary drawing
 
1. An electromagnetic air pump, comprising:
a swing arm driven by a force generated by an electromagnetic field;
a cylinder base having a platform surface, wherein a first end of the swing arm is rotatably disposed on the cylinder base, a second end of the swing arm opposite to the first end is provided with a magnetic element for the swing arm, when controlled by a coil, to correspondingly press downward or lift the cover, a height of the platform surface of the cylinder base near the first end is greater than a height of the platform surface of the cylinder base near the second end, and the platform surface appears as an inclined surface; and
an air chamber operable to be compressed or expanded, defined by the platform surface and a rubber cap operable to be compressed downward by the swing arm, the rubber cap comprising a support and a cover, the cover configured to bear against the support with the platform surface when compressed by the swing arm during an operation of the electromagnetic air pump;
wherein when the air chamber is compressed or expanded, each pair of geometrically symmetrical parts of the cover corresponds to a pair of displacement changes relative to the platform surface, and a difference between the pair of displacement changes is not greater than 5%, so as to achieve an effect of a uniform stress upon the cover.