Title:
A fluid injection head and a fluid injector
Document Type and Number:
Japanese Patent JP6273893
Kind Code:
B2
Abstract:
Piezoelectric elements each have a configuration in which a lower electrode film, a piezoelectric body layer, and an upper electrode film are stacked in order from a side relatively near to a displacement portion that defines a pressure chamber by tightly closing a portion of a pressure chamber space that forms the pressure chamber. The lower electrode film is provided individually for each pressure chamber. The upper electrode film covers the lower electrode film and the piezoelectric body layer, and is common to the piezoelectric elements. The ratio of a length (L) of a displacement portion-side opening of each pressure chamber space in a direction orthogonal to a pressure chamber space juxtaposition direction to a width (W) of the displacement portion-side opening in the pressure chamber space juxtaposition direction is greater than or equal to 4.3 and less than or equal to 6.0.
Inventors:
Erika Hirai
Yoshinao Miyata
Fukuzawa Yuma
High Standard
Takadake
Shiro Yazaki
Yoshinao Miyata
Fukuzawa Yuma
High Standard
Takadake
Shiro Yazaki
Application Number:
JP2014032770A
Publication Date:
February 07, 2018
Filing Date:
February 24, 2014
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
B41J2/14
Domestic Patent References:
| JP2013163361A | ||||
| JP2013199034A | ||||
| JP2006248166A |
Foreign References:
| US20110050808 |
Attorney, Agent or Firm:
Teruho Tsukui
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