NEGATIVE PRESSURE REGULATOR OF INKJET PRINTER

摘要

A negative pressure regulator of an ink-jet printer is provided to guarantee reliability of operations by rapidly restoring a diaphragm by a restoring force of a spring. A negative pressure regulator(140) of an ink-jet printer includes upper, intermediate, and lower members(141,142,143) and a spring(146). The upper member has a space for a diaphragm(145). The diaphragm made of a flexible material is installed inside the space of the upper member. The intermediate member contains an ink storage groove(1422) and a connection groove(1425). The ink storage groove is recessed on the upper surface of the intermediate member. The connection groove penetrates through the intermediate member. The spring is interposed between the upper and intermediate members and supports the diaphragm. The lower member includes an ink inlet groove(1431) and an ink outlet(1433). The ink inlet groove is recessed to let ink flow in. The ink outlet is formed adjacent to the ink inlet groove, penetrates through the lower member, and is connected with the connection groove.