Abstract: An displacement amplifying mechanism that enlarges an amount of displacement of an actuator includes an accommodation chamber in which a liquid is sealed, a first wall portion that forms a wall surface of the accommodation chamber and applies a pressure to the liquid in accordance with displacement of the actuator, and a second wall portion that forms the wall surface of the accommodation chamber and is displaced in a first direction which is a direction away from the accommodation chamber in a state where an elastic force acting in a second direction approaching the accommodation chamber is generated by a pressure of the liquid when the first wall portion applies the pressure to the liquid, in which an area of the second wall portion in contact with the liquid is smaller than an area of the first wall portion in contact with the liquid.

Abstract: In a droplet discharge head, in an initial state in which a tip of the actuator has contact with the vibrating plate, and the actuator pushes the vibrating plate toward the first direction, based on a drive signal from the control section, the tip of the actuator displaces the vibrating plate toward the second direction in a state of having contact with the vibrating plate to thereby pull in a meniscus in the nozzle toward the liquid chamber, then, the tip of the actuator is separated from the vibrating plate to further displace the vibrating plate toward the second direction, and then, the tip of the actuator collides with the vibrating plate to thereby displace the vibrating plate toward the first direction to discharge the liquid from the nozzle.

Abstract: A supply device that supplies a liquid to a liquid ejecting head, includes one or more tanks that house the liquid; a liquid flow path coupled to the one or more tanks and the liquid ejecting head; and a pressure-adjusting portion that adjusts a pressure in the one or more tanks. The one or more tanks are provided between the pressure-adjusting portion and the liquid flow path. The pressure-adjusting portion includes a communication path that communicates with the one or more tanks, a pressure chamber provided with a diaphragm and coupled to the communication path, and an urging portion that urges the diaphragm in a direction in which the pressure chamber expands.

Abstract: A liquid ejecting apparatus includes a liquid chamber that communicates with a nozzle, a communication flow path that communicates with the liquid chamber and that has a first opening into which a liquid flows, a discharge flow path that discharges the liquid and that has a second opening into which the liquid flows, a supply flow path capable of supplying the liquid to the communication flow path and the discharge flow path, and a first slide portion disposed between the supply flow path and the communication flow path and having a first through hole that enables the supply flow path to communicate with the communication flow path. The first slide portion, by sliding along the opening surface of the first opening, changes the position of the first through hole with respect to the communication flow path and changes the flow path resistance of the communication flow path.

Abstract: A liquid-discharging-head includes a nozzle having a first-nozzle-portion having a first-sectional-area and a second-nozzle-portion having a second-sectional-area larger than the first-sectional-area, a liquid chamber which communicates with the nozzle, and a piezoelectric-element which changes a pressure inside the liquid chamber, in which the piezoelectric-element is driven from the control section, and the liquid-discharging-head executes a first control in which an apex of a liquid surface is drawn into the second-nozzle-portion in a state in which an inner wall surface of the first-nozzle-portion is covered by a liquid film by decreasing the pressure inside the liquid chamber, and a second control in which a shape of the apex of the liquid surface is inverted to a protruding shape towed the opening and the droplet is discharged from the nozzle by increasing the pressure inside the liquid chamber in a state in which the inner wall surface is covered by the liquid film.

Abstract: A droplet discharge head includes a plurality of nozzles, first liquid chambers communicating with the nozzles, a first inflow path for supplying a liquid to the first liquid chambers, a first actuator that individually changes pressures of the first liquid chambers, and a second actuator that changes pressures of a plurality of first liquid chambers in common, in which an expansion/contraction amount of the second actuator is larger than that of the first actuator.

Abstract: A droplet discharge head each includes a first liquid chamber formed on a flow path forming substrate, a nozzle communicating with the first liquid chamber, and a first inflow path for supplying a liquid to the first liquid chamber, and a first actuator that individually changes a pressure in the first liquid chamber, a second actuator that changes pressures in a plurality of first liquid chambers in common, in which an amount of expansion/contraction of the second actuator is larger than that of the first actuator.

Abstract: A liquid ejecting apparatus includes a plurality of nozzles, a plurality of pressure chambers, a plurality of pressure-generation-elements, a plurality of inflow channels, a first-channel-resistance-changing-section, and a control-unit. The control-unit repeats control of switching between a first state in which the control-unit controls the first-channel-resistance-changing-section to collectively increase channel resistance of the inflow channels and a second state in which the control-unit controls the first-channel-resistance-changing-section to collectively decrease the channel resistance of the inflow channels.

Abstract: A fluid discharge apparatus includes a storage chamber, a moving body, a drive mechanism, and a coupling member. The storage chamber includes a discharge port to discharge the fluid. The moving body includes a leading end portion facing the discharge port inside the storage chamber. The drive mechanism is positioned on the opposite side of the moving body to the discharge port, and performs an operation to reciprocate the moving body. The coupling member couples the moving body to the drive mechanism such that the moving body is attachable and detachable. The coupling member includes a biasing section to apply an elastic force in a direction to move the moving body toward the drive mechanism, and, while pressing the moving body against the coupling member, to support the moving body in a state in which the moving body is capable of elastic displacement in a direction toward the discharge port.

Abstract: A liquid discharging apparatus includes: a liquid compartment; a flowing-in passage that is in communication with the liquid compartment through a flowing-in opening, the liquid flowing through the flowing-in passage into the liquid compartment; a nozzle that is in communication with the liquid compartment through a communication opening; a capacity changer that causes the liquid contained in the liquid compartment to be discharged from the nozzle by causing a displacement of an inner wall surface of the liquid component and changing capacity of the liquid compartment; and a flowing-in passage resistance changer that changes capacity of the flowing-in passage to change flow resistance of the flowing-in passage. In the liquid compartment, as viewed from the flowing-in opening, the communication opening is located in front of a center-of-displacement portion, an amount of the displacement of which is largest in the inner wall surface displaced by the capacity changer.

Abstract: A liquid ejecting apparatus includes: a pressure chamber configured to communicate with a nozzle hole through which a liquid is discharged; a liquid chamber having a first opening configured to communicate with the pressure chamber; a first slide section arranged in the liquid chamber and having a first through-hole at a position corresponding to the first opening; and a driving device configured to drive the first slide section along a predetermined direction. The first slide section slides, by being driven by the driving device, along the predetermined direction on an inner wall surface having the first opening of the liquid chamber, and changes, by changing an area where the first opening and the first through-hole overlap with each other, an opening degree of the first opening, and the first slide section makes linear contact with the inner wall surface having the first opening along the predetermined direction.

Abstract: In a droplet discharge head, in an initial state in which a tip of the actuator has contact with the vibrating plate, and the actuator pushes the vibrating plate toward the first direction, based on a drive signal from the control section, the tip of the actuator displaces the vibrating plate toward the second direction in a state of having contact with the vibrating plate to thereby pull in a meniscus in the nozzle toward the liquid chamber, then, the tip of the actuator is separated from the vibrating plate to further displace the vibrating plate toward the second direction, and then, the tip of the actuator collides with the vibrating plate to thereby displace the vibrating plate toward the first direction to discharge the liquid from the nozzle.

Abstract: A liquid ejecting apparatus including; a first liquid chamber that communicates with a first nozzle, a first channel, and a first outflow channel; a second liquid chamber that communicates with a second nozzle, a second channel, and a second outflow channel; a first volume changing portion that changes a volume of the first liquid chamber to eject liquid from the first nozzle; a second volume changing portion that changes a volume of the second liquid chamber to eject the liquid from the second nozzle; a first inflow channel resistance changing portion that changes a flow channel resistance of the first inflow channel, a second inflow channel resistance changing portion that changes a flow channel resistance of the second inflow channel, and an inflow channel-side common drive portion that applies drive forces to the first inflow channel resistance changing portion and the second inflow channel resistance changing portion.

Abstract: The liquid discharge device includes a plurality of volume changing portions and at least one blocking portion. The plurality of volume changing portions are in combination with a plurality of pressure chambers which communicate with nozzles for discharging a liquid and which have inlets through which the liquid flows into the plurality of pressure chambers. The at least one blocking portion blocks communication at the inlets. The plurality of volume changing portions are arranged in a plurality of rows spaced from one another. In a direction along the plurality of rows, the plurality of rows of volume changing portions are staggered from one another. The liquid is discharged from the nozzles by using the plurality of volume changing portions in a state in which the inlets are blocked by the at least one blocking portion.

Abstract: A liquid ejecting apparatus includes: a nozzle; a pressure chamber; a flow channel which is connected to the pressure chamber; a flow channel wall portion that changes a flow channel resistance of the flow channel; and an actuator that displaces the flow channel wall portion. An displacement amplifying mechanism is provided between the actuator and the flow channel wall portion. The displacement amplifying mechanism includes an elastic material that is elastically deformed by displacement of the actuator, and an accommodation chamber that is partitioned from the flow channel by the flow channel wall portion and accommodates the elastic material. A first portion of the elastic material receiving a pressure from the actuator, a second portion of the flow channel wall portion being bent and deformed between the flow channel and the accommodation chamber by receiving a pressure from the elastic material, an area of the second portion being less than an area of the first portion.

Abstract: A liquid-ejecting-apparatus includes a nozzle that ejects liquid with a viscosity of 50 mPa·s or higher; a pressure-chamber communicating with the nozzle; a pressure-change-portion that changes a pressure of the liquid in the pressure-chamber; and a controller that controls the pressure-change-portion. The controller executes first control of decreasing the pressure of the liquid in the pressure-chamber, hence pulling a center portion of a meniscus toward the pressure-chamber, and forming a liquid-membrane with the liquid at an inner-wall-surface of the nozzle; and second control of, in a state in which the liquid-membrane is formed at the inner-wall-surface of the nozzle, increasing the pressure of the liquid in the pressure-chamber, hence inverting a shape of the center portion of the meniscus to a protruding shape protruding toward an opening of the nozzle and forming a liquid-column, and further, ejecting the liquid-column so as not to contact the liquid membrane.

Abstract: A liquid-ejecting-apparatus includes a nozzle that ejects liquid; a pressure-chamber-communicating with the nozzle; a pressure-change-portion that changes a pressure of the liquid in the pressure-chamber; and a controller that controls the pressure-change-portion. The controller executes first control of decreasing the pressure of the liquid in the pressure-chamber, hence pulling a center portion of a meniscus of the liquid in the nozzle toward the pressure-chamber, and forming a liquid-membrane with the liquid at an inner-wall-surface of the nozzle; and second control of, in a state in which the liquid-membrane is formed at the inner-wall-surface of the nozzle, increasing the pressure of the liquid in the pressure-chamber, hence inverting a shape of the center portion of the meniscus to a protruding shape protruding toward an opening of the nozzle and forming a liquid-column, and further, ejecting the liquid-column so as not to contact the liquid-membrane.

Abstract: A liquid ejecting apparatus includes a liquid chamber that is in communication with a nozzle that ejects liquid, a volume changing device that changes volume of the liquid chamber, an inflow channel that is connected to the liquid chamber and enables the liquid to flow into the liquid chamber, a discharge channel that discharges the liquid, a first flow path resistance changing device that changes flow path resistance of the inflow channel, a liquid supply section that supplies the liquid to the inflow channel by pressurizing the liquid, and a bypass channel that enables the liquid supplied from the liquid supply section to bypass the inflow channel and to flow into the discharge channel.

Abstract: A fluid ejection device is a fluid ejection device adapted to eject a fluent material, including a fluent material chamber supplied with the fluent material, a moving object, which can reciprocate in the fluent material chamber, a nozzle part having a discharge port communicating with the fluent material chamber, and an inner wall on a periphery of the discharge port on which a tip part of the moving object can contact from the fluent material chamber side, and an actuator having contact with a back end part of the moving object to reciprocate the moving object to thereby discharge the fluent material from the discharge port. The actuator has a plurality of solid-state displacement elements connected in series to each other, and one end of one of the plurality of solid-state displacement elements has contact with the back end part of the moving object.

Abstract: A liquid ejecting apparatus includes a liquid chamber in communication with a nozzle, a volume changing unit configured to change a volume of the liquid chamber, an inflow passage through which the liquid flows into the liquid chamber, an outflow passage through which the liquid flows out of the liquid chamber, a passage resistance changing unit configured to change a passage resistance of the outflow passage, and a controller configured to control the volume changing unit to reduce the volume of the liquid chamber so as to cause the liquid to be ejected through the nozzle. In filling the liquid chamber with the liquid for ejection of the liquid through the nozzle, the controller controls the passage resistance changing unit to change the passage resistance of the outflow passage to an increased passage resistance and controls the volume changing unit to increase the volume of the liquid chamber.