Seiko Epson Corporation

Sony Corporation

Hajime Nakao

Shunsuke Watanabe

Eiju Hirai

Shunya Fukuda

Eiji Natori

Takaaki Koizumi

Keiji Hara

Motoki Takabe

Yasuhiro Watanabe

Takayuki Kato

Hiroyuki Hagiwara

Shiro Yazaki

Masao Nakayama

Isamu Togashi

Katsumi Enomoto

Yasushi Yamazaki

Akira Miyagishi

Manabu Munakata

Takashi Kunimori

Masato Komazawa

Nobuhiko Yamauchi

Nozomi Ogawa

A liquid ejecting apparatus includes a first head unit having a first head provided with a plurality of first nozzles and a second head unit having a second head provided with a plurality of second nozzles and a third head provided at a position different from the second head in a first direction and provided with a plurality of third nozzles. The second head and the third head are provided at different positions in a second direction intersecting with the first direction, and the first head unit and the second head unit are disposed such that a width at which the first head and the second head overlap in the first direction is smaller than a width at which the second head and the third head overlap in the first direction.

Liquid ejecting apparatus

A liquid ejecting head includes a flow path forming substrate, a vibration plate that is formed on one surface side of the flow path forming substrate, a first piezoelectric element that is provided on the vibration plate, a second piezoelectric element that is provided on the vibration plate, a protective substrate that is bonded to the one surface side of the flow path forming substrate, a flow path member that is adhered to a side of the protective substrate opposite to the flow path forming substrate via an adhesive, and a drive circuit that is mounted in a space formed so as to be surrounded by the flow path forming substrate, the protective substrate, and the flow path member, in which the flow path member is provided with a hole portion which is open to a region facing the space.

Liquid ejecting head, liquid ejecting apparatus, and piezoelectric device

A liquid ejecting head includes a flow path forming substrate, a vibration plate that is formed on one surface side of the flow path forming substrate, a plurality of piezoelectric elements that are provided on the vibration plate, a protective substrate that is bonded to the one surface side of the flow path forming substrate and has a flow path, a flow path member that is bonded to a side of the protective substrate opposite to the flow path forming substrate, a drive circuit that is mounted in a space formed so as to be surrounded by the flow path forming substrate, the protective substrate, and the flow path member, a filler that is filled between the drive circuit and the protective substrate, and a protective film that is formed on an inner wall, in which the protective film has an exposure hole exposing a surface of the filler.

A flow path forming substrate in which an individual flow path which communicates with a nozzle opening that discharges liquid is formed; and a communication plate in which a recess portion which configures at least a part of a common flow path that is common to and communicates with the plurality of individual flow paths is provided to be open on a side opposite to the flow path forming substrate, are provided, the recess portion includes a first recess portion, and a second recess portion which is deeper than the first recess portion, the communication plate includes a supply path which is provided to be open on a bottom surface of the first recess portion, communicates with the recess portion and the individual flow path, and becomes a throttle portion that throttles a flow path with respect to the individual flow path, and a communication path which communicates with the individual flow path and the nozzle opening, and in the individual flow path, a throttle portion which throttles the individual flow path from a part that communicates with the supply path to a part that communicates with the communication path, is not provided.

Liquid ejecting head, liquid ejecting apparatus, and manufacturing method of liquid ejecting apparatus

A liquid-jet head includes: a passage member including a plurality of individual passages and a manifold communicating commonly with the individual passages, the individual passages each having a pressure generating chamber communicating with a nozzle orifice that ejects liquid, the pressure generating chambers being formed on one surface side of the passage member on an opposite side from the nozzle orifices, the individual passages and the manifold communicating with each other through communicating paths, and each adjacent two of the individual passages communicating with each other through the corresponding communicating path; and reinforcement walls each provided between the communicating paths in a parallel direction of the individual passages, the reinforcement walls defining the communicating paths.

Liquid-jet head and liquid-jet apparatus

A liquid ejecting apparatus includes a liquid ejecting head that includes a nozzle opening which ejects liquid and a valve unit that is connected to the liquid ejecting head and opens and closes a flow passage of the liquid, in which the valve unit includes a valve seat which is provided in the flow passage and a valve body which opens and closes the flow passage by coming into contact with or being separated from the valve seat, the valve seat includes a contacting member coming into contact with the valve body and a supporting member which supports the contacting member, the contacting member is assembled with the supporting member in a state in which the supporting member is subjected to a water repellent treatment more than the inner surface of the flow passage, and the valve body includes an elastic member coming into contact with the valve seat and a fixing member which fixes the elastic member.

Liquid ejecting apparatus with water repellent region

A liquid ejecting head which ejects a liquid from a nozzle of a nozzle plate by means of pressure change in a pressure chamber includes a first member made of ceramics and including the pressure chamber, a second member located between the first member and the nozzle plate, the second member being made of a metal and including a first flow path at a position upstream to the pressure chamber so as to regulate the amount of liquid which flows into the pressure chamber, and a ground wire that grounds the second member.

Liquid ejecting head and liquid ejecting apparatus

A flow path unit includes a pressure chamber substrate in which a plurality of pressure chambers are arranged in a first direction; and a piezoelectric element that changes a volume of the pressure chamber, in which a plane shape of an active section of the piezoelectric element is contained such that a width on one side thereof in a second direction crossing the first direction is wider than that on the other side in the second direction. The side on which the width of the active section of the piezoelectric element is great and the side on which the width thereof is smaller in the second direction be alternately disposed each other so that the active sections adjacent to each other are arranged differently from each other in the first direction.

Flow path unit and liquid ejecting apparatus equipped with flow path unit

A flow path component includes a first flow path member that includes a first flow path, a second flow path member that includes a second flow path which communicates with the first flow path, a covering layer that coats a wall surface of the first flow path, and an adhesion layer that adheres the first flow path member and the second flow path member with each other and covers at least a part of an end portion of the covering layer. Also, at least a part of the first flow path of the first flow path member is configured as a pressure chamber that applies pressure to a liquid which is supplied.

Flow path component, liquid ejecting apparatus, and method for manufacturing flow path component

The portions at the circumferential edges of a flow channel formation plate in which the corner portions of a dummy flow channel portion are formed are weaker than other portions, and thus when thermal stress has occurred due to temperature changes when the constituent elements of a flow channel unit are affixed to each other, cracks can be induced preferentially in the weak portion, rather than the other portions, starting from the ends of the corner portions. In particular, although similar corner portions are formed in a common liquid chamber, the intersection angle of the corner portions in the dummy flow channel portion is smaller than the intersection angle of the corner portions in the common liquid chamber, and thus it is easier for stress to concentrate in the corner portions of the dummy flow channel portion.

Provided is a liquid ejecting head which ejects liquid from nozzle holes by changing a pressure in a liquid flow path in a pressure chamber. The liquid ejecting head includes a flow path member which is formed of ceramic, and in which the pressure chamber is formed; and a piezoelectric element which includes at least a first piezoelectric layer which is formed of ceramic. The first piezoelectric layer of the piezoelectric element is bonded to the flow path member, and the first piezoelectric layer faces the pressure chamber.

Liquid ejecting head, liquid ejecting apparatus, and method of manufacturing liquid ejecting head

A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.

A piezoelectric unit includes a diaphragm made of ceramics, a base portion having a pressure chamber in which the diaphragm is set to a wall and a piezoelectric element having a dielectric layer provided at the opposite side of the base portion with respect to the diaphragm. In the piezoelectric unit, the roughness of a crystal of the outermost interface at the side of the piezoelectric element of the diaphragm is further smoothened than that of a ceramics material which is included in the diaphragm more inside than the interface.

Piezoelectric unit, liquid ejecting head, liquid ejecting apparatus and method of manufacturing piezoelectric unit

A liquid ejecting head that ejects liquid includes a flow path member that includes a plurality of pressure chambers through which the liquid flows, pressure generation elements that include active parts arranged at positions corresponding to the pressure chambers and a common electrode for generating a common potential to the respective pressure chambers, and a conductive member that is electrically connected to the common electrode on the flow path member at the side to which the pressure generation elements are fixed and lowers resistance of the common electrode.

Provided is a liquid ejecting apparatus including a liquid ejecting head that ejects liquid through nozzle openings, and a wiper that sweeps a liquid ejection surface side of the liquid ejecting head, in which the liquid ejecting head includes a nozzle plate having the liquid ejection surface and a protection member that protrudes further on a liquid discharging side than the nozzle plate, and the wiper sweeps a surface of the protection member, which is an exterior surface of the protection member intended to be swept, toward the nozzle plate side, and then the wiper sweeps the liquid ejection surface so that the wiper moves away from the surface of the protection member and comes into contact with a portion between the nozzle openings on the nozzle plate and an end portion of the nozzle plate, which is located on an opposite side in a sweeping direction.

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Azumino, Japan

Hajime Nakao