Abstract: A circuit board (32) has a board main body (32M), a pair of first electrodes (32d) for contact with and electrical connection to electrodes (91c) of a liquid consuming apparatus, the first electrodes (32d) being formed on a first surface of the board main body (32M), and a pair of second electrodes (32e) for contact with and electrical connection to terminal plates (45) of a sensor unit (35), the second electrodes (32e) being formed on an opposite, second surface of the board main body (32M) and electrically connected respectively to the first electrodes (32d).

Abstract: A liquid detector includes: a case in which a flow channel is exposed from an opening; a sensor base, disposed in the opening of the case to face the flow channel; a sensor chip, mounted on a surface opposite to a surface of the sensor base which faces the flow channel and including a piezoelectric element; a film, adapted to hold the sensor base in the opening and sealing the opening; a circuit board, disposed in such a manner as to face the sensor chip; a relay terminal, electrically connecting the sensor chip and the circuit board; and a support member, adapted to support the circuit board and the relay terminal and fixed to the case. The relay terminal includes: a base end portion, fixed to the support member; and first and second free end portions, separately extending into two branches from the base end portion, and a first contact connected to the circuit board is formed in the first free end portion, and a second contact connected to the sensor chip is formed in the second free end portion.

Abstract: A liquid container is for supplying a liquid to a liquid jetting apparatus. The liquid container includes a liquid reservoir section, a sensor and an electrostatic capacitance. The liquid reservoir section stores electrically conductive liquid. The sensor is disposed at a location in the liquid reservoir section, for electrically detecting a condition of the conductive liquid at the location. The electrostatic capacitance is provided between a fixed potential and the conductive liquid, the electrostatic capacitance reducing extrinsic noise.

Abstract: A liquid container for supplying a liquid to a liquid jetting apparatus includes a liquid reservoir section and a sensor. The liquid reservoir section stores electrically conductive liquid. The sensor is disposed at a location in the liquid reservoir section, for electrically detecting a condition of the conductive liquid at the location. A fixed potential is applied to the conductive liquid.

Abstract: A liquid container (21) has: an outer electrode (32d) contactable with an electrode (91c) of a liquid consuming apparatus; an electrode supporting member (32,33) which supports the outer electrode (32d) and is fixed to a container body (31); a piezoelectric sensor unit (35) which is discrete from the electrode supporting member (32,33), which is attached to the container body (31) for detecting liquid existing in a part of a liquid supply path and which includes a piezoelectric element (41) having an electrode (41a); and a connector (45) which has an elasticity and which electrically connects the outer electrode (32d) to the electrode (41a) of the piezoelectric element (41).

Abstract: In an ink cartridge, a negative pressure generating mechanism is disposed between an ink storage region and an ink supply port, and has a wall surface having two through-holes for ink flow, and a valve member contacted with and separated from the through-hole by receiving a pressure in an ink supply port side. Ink flowing via the through-hole is supplied via the through-hole to the ink supply port.

Abstract: A mounting structure of a liquid sensor comprising: a vibration cavity forming base portion which has a first surface and a second surface opposed to each other and in which a cavity for receiving a medium as a detection target is formed to be open toward the first surface side and a bottom surface of the cavity can vibrate; a sensor including a piezoelectric element having a first electrode formed on the second surface side of the vibration cavity forming base portion, a piezoelectric layer formed on the first electrode, and a second electrode formed on the piezoelectric layer; a mounting target member which is mounted with the sensor, the mounting target member having an upstream space which communicates with the cavity through an upstream flow path and a downstream space which communicates with the cavity through a downstream flow path; and an elastic seal member which is disposed between the sensor and the mounting target member and which seals a space between the sensor and the mounting target member.

Abstract: A mis-assembly preventing structure is provided to a liquid container to allow assembly of parts when the parts are assembled in an adequate direction and to prevent the assembly of the parts when the part are assembled in an inadequate direction. For example the structure can be provided to a sensor unit (200) and a cartridge case (101), and can be constructed by engagement hooks (267) and engagement concave portions (110k) for receiving the engagement hooks (267).

Abstract: A liquid detecting device (1200) including: a unit base (1210), provided with a recessed portion (1211) on an upper face thereof and containing a first material; a sensor base (1220), accommodated in the recessed portion and containing a second material different from the first material; a sensor chip (1230), mounted on an upper face of the sensor base (1220) and having a sensor cavity (1232) for receiving a liquid as a detection target, in which a lower face of the sensor cavity (1232) is formed to be opened for allowing the liquid to flow therein and an upper face thereof is closed by a vibration plate (1233) and provided with a piezoelectric element (1234) mounted on an upper face of the vibration plate (1233); an adhesive layer (1242), formed on the upper face of the sensor base and fixing and sealing the sensor chip (1230) and the sensor base (1220) to each other; and an adhesive film (1240), which fixes and seals the sensor base (1220) and the unit base (1210) to each other and of which an inner periphe

Abstract: Ink cartridge 70 is attached to cartridge holder 62 of printing apparatus 20 by being inserted in a predetermined insertion direction R until it is touching locating member. Ink cartridge 70 includes a plurality of low voltage circuit terminals 111-113 and a plurality of high voltage circuit terminals 114, 115 on body 71. Low voltage circuit terminals 111-113 are arranged so as to form row A2 orthogonal to insertion direction R. High voltage circuit terminals 114, 115 are arranged so as to form row B2 orthogonal to insertion direction R. Row B2 is arranged further towards the insertion direction R side than row A2.

Abstract: A liquid detection device includes a casing main body in which a passage is formed and exposed in an opening, a sensor base that is disposed to face the passage of the casing main body, a sensor chip provided on the sensor base, a film that seals the opening in which the sensor base is held, and a partition wall that divides the passage into an upstream side and an downstream side. The sensor chip has a sensor cavity, and the sensor base has a first hole that guides a liquid from the upstream side to the sensor cavity, and a second hole that guides the liquid from the sensor cavity to the downstream side. The sensor base can come into contact with the casing main body through only the partition wall in a depth direction of the opening.

Abstract: A liquid ejecting head includes a flow passage formation section and a sealing section. The flow passage formation section includes a plurality of nozzle openings, ejecting liquid therefrom, a plurality of pressure generation parts, corresponding to the nozzle openings respectively, a plurality of liquid supply passages, communicating with the pressure generation parts respectively for supplying liquid thereto, and a plurality of partition wall parts, each separating one liquid supply passage and its corresponding pressure generation part from another liquid supply passage and its corresponding pressure generation part. The sealing section seals the flow passage formation section. The partition wall parts respectively include liquid supply passage partition wall parts which separate adjacent liquid supply passages. The sealing section has a thick part and a thin part.