Liquid ejection head, liquid ejection unit, and liquid ejection device
US9902151B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2016 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Mar 8, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A liquid ejection head includes a plurality of structures arrayed in a predetermined direction, each structure including a nozzle to eject liquid, a pressure chamber in communication with the nozzle, and an ejection drive unit to increase pressure of the liquid in the pressure chamber. The ejection drive unit of each structure includes a diaphragm to form a wall of the pressure chamber, and an electromechanical transducer element including an electromechanical transducer film, the diaphragm being convex toward the pressure chamber. When an amount of curvature of the diaphragm for the pressure chamber of each structure is defined by a radius of curvature, an inclination difference of the radius of curvature with respect to the predetermined direction is equal to or less than 2500 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.