| 摘要 |
In order to reduce noise without increasing the number of components, this compact pump is equipped with: a case; a diaphragm assembly provided in the upper portion of the interior of the case and including multiple diaphragm parts forming multiple pump chambers; and a rocking body that is provided in the lower portion of the interior of the case, and that moves the multiple diaphragm parts up and down. The diaphragm assembly is equipped with multiple air intake valve bodies for opening/closing multiple air introduction holes formed in the rocking body. An upper cover of the case has an exhaust hole and multiple annular recesses. The upper cover has multiple cylindrical inner wall surfaces forming the multiple annular recesses. The diaphragm assembly is equipped with multiple cylindrical exhaust valve bodies arranged in contact with the multiple cylindrical wall surfaces in the respective multiple annular recesses, and a rib provided in the center part of the diaphragm assembly in the vicinity of the exhaust hole and connecting the center-side outer walls of the multiple cylindrical exhaust valve bodies. |
