Liquid discharge head and liquid discharge device
AssigneeRISO Technologies Corporation
InventorsTakashi Tozuka, Masato Fukasawa
Life of this patent
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Abstract
According to an embodiment, a liquid discharge head includes a base plate having an elongated hole therein. The elongated hole extends lengthwise in a first direction and laterally in a second direction perpendicular to the first direction. A corner portion of the elongated hole that is near an end of the elongated hole in the first direction is rounded or the end is semicircular. A piezoelectric actuator is on the base plate at a position adjacent to the elongated hole in the second direction. The piezoelectric actuator includes a plurality of pressure chambers disposed along the first direction.
Claims13
A liquid discharge head, comprising:
- a base plate having an elongated hole therein, the elongated hole extending lengthwise in a first direction and laterally in a second direction perpendicular to the first direction, a corner portion of the elongated hole proximate to an end of the elongated hole in the first direction being rounded;
- and
- a first piezoelectric actuator on the base plate at a position adjacent to the elongated hole in the second direction, the first piezoelectric actuator including a plurality of pressure chambers disposed along the first direction, wherein, when a width of the elongated hole in the second direction is a value W, the radius of curvature R of the corner portion satisfies the relationship:
- W×0.2±(W×0.2×0.25)≤R≤W×0.5±(W×0.5×0.25).
A liquid discharge device, comprising:
- a liquid supply source;
- and
- a liquid discharge head including:
- a base plate having an elongated hole therein, the elongated hole extending lengthwise in a first direction and laterally in a second direction perpendicular to the first direction, a corner portion of the elongated hole proximate to an end of the elongated hole in the first direction being rounded;
- and
- a first piezoelectric actuator on the base plate at a position adjacent to the elongated hole in the second direction, the first piezoelectric actuator including a plurality of pressure chambers disposed along the first direction, wherein
- the elongated hole is fluidly connected to the liquid supply source, and
- when a width of the elongated hole in second direction is a value W, the radius of curvature R of the corner portion satisfies the relationship:
- W×0.2±(W×0.2×0.25)≤R≤W×0.5±(W×0.5×0.25).
Dependencies are inferred from the claim text.