Roundel structure for five-compressing-chamber diaphragm pump

摘要

The present invention provides a roundel structure for five-compressing-chamber diaphragm pump. The eccentric roundel structure is a cylindrical eccentric roundel in an eccentric roundel mount. The cylindrical eccentric roundel basically comprises an annular positioning dent, a vertical flank and a sloped top ring created from the annular positioning dent to the vertical flank. By means of the sloped top ring, the oblique pull and squeezing phenomena of high frequency incurred in a conventional tubular eccentric roundel are completely eliminated. Thus, not only the durability of the five-compressing-chamber diaphragm pump for sustaining the pumping action of high frequency from the cylindrical eccentric roundels is mainly enhanced but also the service lifespan of the five-compressing-chamber diaphragm pump is exceedingly prolonged.