Abstract: A liquid ejecting head including a nozzle configured to eject a liquid, a liquid flow path communicating with the nozzle, a communication chamber including a communication port configured to communicate with atmospheric air, a partitioning wall portion provided between the liquid flow path and the communication chamber, the partitioning wall portion including an opening portion that communicates the liquid flow path and the communication chamber to each other, and an elastic member closing the opening portion.

Abstract: A liquid ejecting unit including a flow path structure into which a liquid flow from a liquid reservoir that temporarily stores the liquid, a liquid ejecting head coupled to the flow path structure and including a nozzle for ejecting the liquid supplied from the flow path structure, and a heating portion heating the liquid inside the flow path structure.

Abstract: A flow path member coupled to a pipe including a first-flow path includes a coupling member including a coupling surface provided with a recessed portion that the pipe is inserted and a second-flow path communicating with the first-flow path and an opening provided in a bottom surface of the recessed portion, and an elastic member that is inserted into the recessed portion and is provided with a through hole that the pipe is inserted. The elastic member includes a first-seal portion being in contact with the pipe and a second-seal portion being provided apart from the bottom surface and being in contact with the coupling member. Between the second-seal portion and the bottom surface, a gap is provided between an outer circumferential surface of the elastic member and an inner circumferential surface of the recessed portion, and the gap communicates with the second-flow path.

Abstract: A liquid ejecting head including a nozzle configured to eject a liquid, a liquid flow path communicating with the nozzle, a communication chamber including a communication port configured to communicate with atmospheric air, a partitioning wall portion provided between the liquid flow path and the communication chamber, the partitioning wall portion including an opening portion that communicates the liquid flow path and the communication chamber to each other, and an elastic member closing the opening portion.

Abstract: A liquid ejecting unit including a flow path structure into which a liquid flow from a liquid reservoir that temporarily stores the liquid, a liquid ejecting head coupled to the flow path structure and including a nozzle for ejecting the liquid supplied from the flow path structure, and a heating portion heating the liquid inside the flow path structure.

Abstract: A liquid ejecting head includes a plurality of driving elements that causes an ejection of a liquid from a nozzle by causing a fluctuation in a pressure, a sealing body that seals a first space for accommodating the plurality of driving elements, a case member that forms a second space for surrounding the sealing body, an atmosphere vent that is formed in the case member and through which the second space communicates with the air, a communication hole that is formed in the sealing body and through which the first space communicates with the second space, and a moisture absorbent disposed in the second space.

Abstract: A control method of a liquid ejecting apparatus is provided. The liquid ejecting apparatus includes a liquid ejecting head for ejecting a liquid in an inner-space thereof through a nozzle, an inflow-channel for flowing the liquid into the inner space, an outflow-channel for flowing the liquid out of the inner space, and a valve for the inflow-channel. The control method includes first control of opening the inflow-channel by opening the valve in accordance with a negative pressure on a downstream side of the valve to generate a liquid flow from the inflow-channel to the outflow-channel, second control of opening the inflow-channel by opening the valve by an external force to generate the liquid flow from the inflow-channel to the outflow-channel, and performing the second control, in accordance with a flow amount of the liquid flow, to open the valve under the first control.

Abstract: A liquid ejecting apparatus includes a liquid path comprising a filter and a liquid storing chamber for supplying liquid to a liquid ejecting head. The liquid storing chamber has an inlet, a bubble retention space disposed above the inlet, a bottom disposed below the bubble retention space, and a first outlet and a second outlet. (i) The first outlet is located on one side of an imaginary center line passing through the center of a projected area, and the second outlet is located on the other side of the imaginary center line. Alternatively, (ii) the first outlet and the second outlet are located outside a projected area defined by projecting the bubble retention space onto the bottom.

Abstract: A liquid ejecting head includes a pressure chamber that communicates with a nozzle which ejects liquid, a liquid chamber that communicates with the pressure chamber, a flexible compliance member that defines a portion of the liquid chamber, and a pressure adjusting mechanism that adjusts a supply pressure of liquid supplied to the liquid chamber. The pressure adjusting mechanism can adjust displacement of the compliance member.

Abstract: A water-based ink includes a pigment, and water, in which a viscosity at 20° C. is in a range of 2 mPa·s to 7 mPa·s, and a yield value at 20° C. is less than 0.2 mPa, and the yield value at 20° C. when evaporating 25% of the water is less than 0.8 mPa.

Abstract: A liquid ejecting head includes a pair of connectors that can be connected to each other, a flexible circuit on which one of the connectors is mounted, a circuit board on which another one of the connectors is mounted, a driver element that generates a driving force for ejecting liquid from a nozzle in response to an electric signal that is supplied from the flexible circuit to the circuit board via the pair of connectors, and a locking mechanism that locks connection between the connector of the circuit board and the connector of the flexible circuit.

Abstract: A liquid ejecting head includes a plurality of driving elements that causes an ejection of a liquid from a nozzle by causing a fluctuation in a pressure, a sealing body that seals a first space for accommodating the plurality of driving elements, a case member that forms a second space for surrounding the sealing body, an atmosphere vent that is formed in the case member and through which the second space communicates with the air, a communication hole that is formed in the sealing body and through which the first space communicates with the second space, and a moisture absorbent disposed in the second space.

Abstract: A control method of a liquid ejecting apparatus is provided. The liquid ejecting apparatus includes a liquid ejecting head for ejecting a liquid in an inner-space thereof through a nozzle, an inflow-channel for flowing the liquid into the inner space, an outflow-channel for flowing the liquid out of the inner space, and a valve for the inflow-channel. The control method includes first control of opening the inflow-channel by opening the valve in accordance with a negative pressure on a downstream side of the valve to generate a liquid flow from the inflow-channel to the outflow-channel, second control of opening the inflow-channel by opening the valve by an external force to generate the liquid flow from the inflow-channel to the outflow-channel, and performing the second control, in accordance with a flow amount of the liquid flow, to open the valve under the first control.

Abstract: A liquid ejecting apparatus includes a liquid path comprising a filter and a liquid storing chamber for supplying liquid to a liquid ejecting head. The liquid storing chamber has an inlet, a bubble retention space disposed above the inlet, a bottom disposed below the bubble retention space, and a first outlet and a second outlet. (i) The first outlet is located on one side of an imaginary center line passing through the center of a projected area, and the second outlet is located on the other side of the imaginary center line. Alternatively, (ii) the first outlet and the second outlet are located outside a projected area defined by projecting the bubble retention space onto the bottom.

Abstract: A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.

Abstract: A liquid ejecting head includes a pair of connectors that can be connected to each other, a flexible circuit on which one of the connectors is mounted, a circuit board on which another one of the connectors is mounted, a driver element that generates a driving force for ejecting liquid from a nozzle in response to an electric signal that is supplied from the flexible circuit to the circuit board via the pair of connectors, and a locking mechanism that locks connection between the connector of the circuit board and the connector of the flexible circuit.

Abstract: A wall-shaped enclosure that forms a space which can accommodate a head chip is formed in a projecting manner at a lower end of a lower case member. Since a cylindrical thick part is formed at the lower end of the lower case member, the lower case member is unlikely to be bent, particularly around the wall-shaped enclosure and a part where the wall-shaped enclosure is disposed. The head chip that is disposed in the space of the lower case member which is unlikely to be bent is unlikely to be subjected to an external force, and the cover member absorbs torsion generated between the head chip and the lower case member so that the head chip is even more unlikely to be subjected to the external force.

Abstract: A liquid ejecting head unit includes: a fixing plate provided with a plurality of openings; a plurality of heads, each of which is provided for each of the openings; and a channel holder that is provided with a plurality of channels and that accommodates the plurality of heads in cooperation with the fixing plate. Each of heads has a nozzle plate provided with a nozzle row having a plurality of nozzles. The head is fixed to a first surface of the fixing plate. An ejection surface is defined by a second surface of the fixing plate and the nozzle plate. The fixing plate has a plurality of sets, each of which has the plurality of openings. Only a part of the openings constituting each of the sets are disposed to be overlapped in a second direction, and the openings are disposed not to be overlapped in a first direction.

Abstract: A water-based ink includes a pigment, and water, in which a viscosity at 20° C. is in a range of 2 mPa·s to 7 mPa·s, and a yield value at 20° C. is less than 0.2 mPa, and the yield value at 20° C. when evaporating 25% of the water is less than 0.8 mPa.

Abstract: A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.