Actuator for an ink jet recording head
AssigneeFuji Xerox Co., Ltd.
InventorsHirofumi Nakamura, Torahiko Kanda
Life of this patent
Estimating the term…
Abstract
A pressurizing unit for pressurizing ink filling a pressure chamber in response to an electric signal is constructed with a beam and a support portion. The support portion is preferably formed integrally with the beam and supports the beam at opposite end portions thereof. The support portion receives a bending force and a shearing force, with are generated at the opposite end portions by a buckling deformation of the beam when the beam is expanded in its longitudinal direction by an application of the electric signal.
Claims31
An ink jet recording head comprising:
- a rigid member defining a pressure chamber formed with a nozzle for jetting ink droplets;
- and
- pressurizing means for pressurizing ink filling said pressure chamber in response to an electric signal, said pressurizing means comprising:
- at least one beam supported at opposite ends thereof;
- and
- a support portion integral with said at least one beam and defining a periphery which surrounds said at least one beam on all sides thereof, said support portion supporting said beam at said opposite ends thereof and restricting an extension of said beam in a longitudinal direction thereof so that, when said beam is expanded in the longitudinal direction by an application of the electric signal, said beam is buckled into a space of said pressure chamber.
An ink jet recording head comprising:
- a container defining a pressure chamber and an ink ejection nozzle in communication with the pressure chamber;
- and
- an actuator in communication with the pressure chamber, the actuator comprising:
- at least one longitudinally extendable beam having opposite ends;
- and
- a frame integral with the at least one beam and defining a periphery which surrounds the at least one beam on all sides thereof and supports the opposite ends of the beam such that when the beam is longitudinally extended, the frame restricts the extending of the beam and causes the beam to displace toward the pressure chamber.
An ink jet recording head comprising:
- a container defining a pressure chamber and an ink ejection nozzle in communication with the pressure chamber;
- and
- an actuator in communication with the pressure chamber, the actuator comprising:
- at least one longitudinally extendable beam having opposite ends;
- and
- first and second transverse support members integral with respective opposite ends of the at least one beam, the first and second transverse support members being coupled to the container in such a manner that when the beam is longitudinally extended the first and second transverse support members restrict the extending of the beam and cause the beam to displace toward the pressure chamber.
An ink jet recording head comprising:
- a body defining a plurality of pressure chambers, the body including an open surface which exposes each of the plurality of pressure chambers;
- and
- a pressure generating member covering the open surface of the body, the pressure generating member including:
- a plurality of longitudinally extendable beams each having opposite ends, each beam being positioned so as to apply pressure to a respective one of the plurality of pressure chambers;
- and
- a support frame integral with the opposite ends of each of the plurality of beams and surrounding the plurality of beams, the support frame supporting the opposite ends of each of the plurality of beams such that when a beam is longitudinally extended, the support frame restricts the extending of that beam and causes that beam to displace toward the pressure chamber.
Dependencies are inferred from the claim text.