Patent ID: 9151285
Filing Date: 2015-10-06
Classification: F04B

Abstract:
1. An air pump structure, comprising: a main body, the main body having two side air chambers at two sides thereof and a single central air chamber which communicates with each of the two side air chambers through an air inlet unit, the single central air chamber being defined by four straight side walls, an open top, and a bottom wall, at least a portion of each side air chamber being positioned beyond the bottom wall of the single central air chamber and directly open to a space underneath the bottom wall of the single central air chamber so as to form a passage underneath the bottom wall of the single central air chamber, an air outlet being provided on a bottom of the space, an opening direction toward outside of the air outlet being opposite to another opening direction toward outside of the open top of the single central air chamber; two air pump members fitted on the two side air chambers to seal the two side air chambers, respectively; a one-way membrane member coupled to an outer edge of the air inlet unit; a one-way valve plate coupled to the air outlet; and a muffler sleeve disposed lower than and being corresponding to the air outlet for eliminating noise, wherein the air inlet unit is disposed in the side air chamber and has a post extending outward from a central portion thereof; the post is connected with a positioning block of the one-way membrane member, and the one-way membrane member is disposed between the post and the positioning block and in direct contact therewith, and the one-way membrane member is mounted on a plane perpendicular to the plane that the one-way valve plate is mounted, and wherein the side air chambers are configured in a manner that the air flowing out of the air inlet unit flows downwardly within the side air chambers and the passage to further pass through the air outlet.