A Piezoelectric Inkjet Printing Nozzle Structure to Prevent Ink Backflow

Abstract

The invention provides a piezoelectric inkjet printing spray head structure preventing ink backflow. An ink supply channel is connected with an ink box. Due to capillary force action, the ink supply channel, a flow limiting part, a pressure generation cavity and a flow guide part are full of ink sequentially, and the ink reaches a nozzle. An upper electrode, piezoelectric ceramics, a lower electrode and a vibration plate form a driving element, when the upper electrode and the lower electrode are electrified simultaneously, the piezoelectric ceramics deform due to an inverse piezoelectric effect, then the vibration plate is driven to deform, the vibration plate deforms to extrude the ink in the pressure generation cavity, the flow limiting part and the flow guide part prevent the ink fromflowing back to the ink supply channel, and the ink is sprayed out from the nozzle. The piezoelectric ceramics are used for the piezoelectric inkjet printing spray head structure, the driving elementgenerate driving force, removing machining is conducted on the base part corresponding to the pressure generation cavity, and the driving element is in a suspension state and is located in the e pressure generation cavity. The piezoelectric inkjet printing spray head structure is simple in manufacture process, low in cost and good in process repeatability and has an ink backflow prevention effect.

Description

technical field

[0001] The present invention relates to include ink cartridge, ink supply channel, restrictor, pressure generating cavity, drainage part, nozzle, upper electrode, piezoelectric ceramics, lower electrode, vibrating plate, particularly, the present invention relates to the pressure that ejects liquid from nozzle place Electro-ink jet printing jet head. Background technique

[0002] Inkjet printers turn colored liquid ink into fine particles through nozzles and spray them onto printing paper. Some inkjet printers have three or four printing nozzles to print four colors of yellow, magenta, cyan and black; Four-color printing. There are two main technologies used in inkjet printers: continuous inkjet technology and random inkjet technology.

[0003] Early inkjet printers and current large-format inkjet printers all use continuous inkjet technology, while the current popular inkjet printers generally use random inkjet technology. The continuous inkjet technology...

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