Abstract: A surgical instrument includes a handle, an adaptor, and a non-contact electrical interface. A proximal end of the adaptor is releasably coupled to a distal end of the handle. The non-contact electrical interface is configured to wirelessly transmit energy from the handle to the adaptor and is configured to wirelessly transmit data from the adaptor to the handle. The electrical interface may include a proximal coil disposed within the handle and a distal coil disposed within the adaptor. When the adaptor is coupled to the handle, the proximal coil may be disposed adjacent the distal coil to form a transformer to inductively transfer energy from the handle to the adaptor and inductively transmit data from the adaptor to the handle.

Abstract: An example printing apparatus is illustrated. The printing apparatus includes a print engine assembly. The print engine assembly further includes a bottom chassis portion. The print engine assembly also includes a top chassis portion. The print engine assembly also includes a print head positioned within the top chassis portion. The print engine assembly also includes a plurality of offset pins coupled to the print head, where the plurality of offset pins abuts the bottom chassis portion, and where the plurality of offset pins enables the print head to be positioned at a predetermined distance from the bottom chassis portion.

Abstract: Replaceable print material supply cartridges for printers are disclosed herein. An example replaceable print material supply cartridge includes logic circuitry that is to determine a position of the replaceable print material supply cartridge by initiating a first voltage on a data contact during a time period, monitoring a timer without reference to a clock signal at a clock contact from a serial data bus, and maintaining a first voltage on the data contact for a duration of time. After expiration of the duration, the logic circuitry is to cause the data contact to assume a second voltage, different than the first voltage, and the logic circuitry is to read data from the memory and cause transmission of a data signal via the serial data bus interface.

Abstract: A method of engaging a supply module with a printhead includes the steps of: moving an actuator handle in a first motion along a first axis, thereby linearly sliding the supply module along the first axis towards the printhead and engaging ink couplings of the supply module with complementary ink ports of the printhead; and moving the actuator handle in a separate second motion along a second axis perpendicular to the first axis, thereby moving a PCB of the supply module towards the printhead and engaging PCB contacts with complementary printhead contacts.

Abstract: In one example in accordance with the present disclosure, a print liquid supply is described. The print liquid supply includes a reservoir for holding a supply of print liquid. The reservoir includes a pliable body having a front face and a back face. The print liquid supply also includes a spout affixed to the reservoir. The spout is located at a corner of the front face offset from a centerline of the front face.

Abstract: A printer ink mist collection system for a printer and a method of collecting and removing ink mist from the printer, the system having a channel extending from a print area to a filtration system wherein the filtration system comprises one or more filters and wherein the channel is configured to direct airborne ink and mist generated during printing to the filtration system and wherein the channel and filtration system are removable from a printer for purposes of cleaning the ink collection system.

Abstract: A manufacturing method of a head leading member, which is provided in a printing machine including a head for discharging an ink toward a working surface, in order to lead the head in a main travelling direction, and the manufacturing method of a head leading member including: a base member fixing step in which a base member, being like a plate, is fixed to a frame extending in the main travelling direction; a guiding reference surface shaping step in which a surface of the base member, in a state of being fixed to the frame, is so manufactured as to be a plane, being along the main travelling direction, in such a way as to shape a guiding reference surface; and a guide member supporting step in which a guide member for leading the head is set in such a way that the guiding reference surface supports the guide member.

Abstract: A liquid ejection system includes: a liquid ejection apparatus; and a liquid storage container, wherein the liquid ejection apparatus includes a mounting unit having an apparatus-side terminal portion that is elastically deformable in a mounting direction, and an apparatus-side locking portion that restricts the liquid storage container from moving in a direction opposite to the mounting direction of the liquid storage container, and the liquid storage container includes a top surface located on an upper side in a vertical direction in a mounted state in which the liquid storage container is mounted, a container-side locking portion, the container-side locking portion being provided on the top surface, and a container-side terminal portion coupled to the apparatus-side terminal portion, the container-side terminal portion being provided at a position closer to the top surface than to a center of the liquid storage container in the vertical direction.

Abstract: An eccentric wheel and an inkjet printer including the eccentric wheel are provided. The eccentric wheel includes two groups of eccentric wheel bodies, mounted on a base of a trolley and configured to drive a print head to move backward and forward and move leftward and rightward in a print head groove. A distance from an outer edge to a rotation center of each of the eccentric wheel bodies is gradually changed. The outer edge of each of the eccentric wheel bodies is in contact with a side edge of the print head. One group of the eccentric wheel bodies are arranged in a forward and backward movement direction of the print head, and the other group of the eccentric wheel bodies are arranged in a leftward and rightward movement direction of the print head.

Abstract: A liquid supply unit includes an outer shell, a liquid supply portion that is arranged in the outer shell and can supply a liquid to the liquid ejection apparatus, and an engaged structure including an engaged portion that can engage with the engagement portion of the liquid ejection apparatus, and a first opening that is formed in the outer shell and through which the engagement structure can be inserted. The engaged portion is arranged further inward than an outer surface of the outer shell.

Abstract: A liquid discharging apparatus includes a first head, a second head, a third head, and a fourth head. The first head has a first part and a second part. The second part is coupled to the first part in a first direction. The second part has a width in a first direction that is shorter than a width of the first part in a second direction. A third part coupled to the first part has a width shorter than the width of the first part in the second direction and is at a position different from the second part in the second direction. The second head includes fourth, fifth, and sixth parts that are arranged similarly to the first, second, and third parts. Parts of the first, second, third, and fourth heads are positioned, respectfully, in the second part, the third part, the fifth part, and the sixth part.

Abstract: A liquid ejecting apparatus includes a fixation member that can be located at a fixation position where a liquid supply coupling portion is coupled to a liquid ejecting head mounted on a carriage and is fixed to the carriage and at a release position where the fixation is released, and a carriage cover provided to the carriage such that the carriage cover is located at a closed position and covers an upper part of the carriage when the liquid ejecting head ejects the liquid. The carriage cover includes a contact portion that comes into contact with the fixation member when the carriage cover is located at a position different from the closed position in a case in which the fixation member is located at the release position.

Abstract: To provide a head leading member with which it is possible to inexpensively lead a head with a high level of accuracy. A head leading member is a head leading member, provided in a printing machine that includes a head to discharge ink toward a working surface, for leading the head in a main travelling direction; and the head leading member comprises; a frame extending in the main travelling direction; a base member fixed to the frame, and having a guiding reference surface that is performed with a manufacture so as to be planar along the main travelling direction, in a state of being fixed to the frame; and a guide member extending in the main travelling direction and being supported on the guiding reference surface of the base member, in order to lead the head in the main travelling direction.

Abstract: A connection arrangement is between first and second members pivoted together between open and lockable positions. The first member has a first connector and the second member has a second connector, said connectors being adapted to connect by linear movement between them. The first member has a user-actuatable handle adapted, when the first and second members are in said lockable position: during a first movement of the handle, to engage a latch member of the first member with a catch on the second member; and, during a second movement, to move the first and second connectors with respect to one another in a first linear direction between a disengaged and an engaged position of the connectors. A block element on the first member is arranged to prevent said first and second movements of the handle when said first and second members are not in said lockable position.

Abstract: A print module includes: a cradle defining a longitudinal cavity and an access opening at a first end of the longitudinal cavity; an elongate printhead positioned in the longitudinal cavity; and a guide positioned at the access opening, the guide having an upper surface configured for guiding the printhead into the longitudinal cavity without contacting an ink ejection face of the printhead. The printhead is removable from the cradle via longitudinal sliding movement of the printhead through the access opening.

Abstract: A print module includes: a cradle defining a longitudinal cavity and an access opening at a first end of the longitudinal cavity; a printhead carrier positioned in the longitudinal cavity, the printhead carrier comprising a longitudinal rail; and an elongate printhead having a longitudinal overhead hanger for complementary longitudinal sliding engagement with the rail. The printhead is removable from the cradle via longitudinal sliding movement of the printhead relative to the printhead carrier through the access opening.

Abstract: A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

Abstract: A flow path formation substrate to which a nozzle plate is mounted includes a pressure chamber per nozzle, an individual supply path leading to the pressure chamber, an individual recovery path communicating with a flow channel near the nozzle. A conduction unit electrically coupled through a lead electrode to a pressure generator causing a pressure of the pressure chamber to vary is located at a position where the conduction unit overlaps with a flow path area of at least one individual flow path of the individual supply path or the individual recovery path in a plan view from a lamination direction in which the nozzle plate and the flow path formation substrate are laminated.

Abstract: Each of a first pressing member and a second pressing member is rotatable about a predetermined axis so as to be capable of changing its posture between a first posture and a second posture inclined upward at its end from the first posture, and is disposed on the mounting part in a rockable manner in a direction pressing the head unit, so as to press the head unit in the first posture.

Abstract: A print module including: a cradle having a longitudinal cavity; an elongate printhead assembly positioned in the longitudinal cavity; a supply assembly slidably movable relative to the cradle along an axis perpendicular to a longitudinal axis of the printhead assembly, the supply assembly being configured for supply of ink and/or electrical signals to a printhead of the printhead assembly; and a locking mechanism having a slide plate slidably movable relative to the cradle along an axis parallel to the longitudinal axis of the printhead assembly. The slide plate has one or more keepers and each keeper is engageable with a locking pin projecting from the supply assembly.

Abstract: A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

Abstract: A printing material supply may include a body to contain a printing material, a latch pivotably coupled to the body by a living hinge and a latch protector. The latch protector may include a structure coupled to and projecting from the body so as to contact a packaging surface of a package to inhibit creep of the latch about the living hinge when the printing material supply is contained within the packaging.

Abstract: A joint structure comprises a light-absorbable member having at least one opening portion and a light-permeable member superposed on the light-absorbable member so as to cover the opening portion, wherein a first annular weld part is formed so as to enclose the opening portion and join the light-absorbable member and the light-permeable member, and a second dot-like weld part(s) joining the light-absorbable member and the light-permeable member is/are formed in a position adjacent to the first weld part.

Abstract: A joint structure comprises a light-absorbable member having at least one opening portion and a light-permeable member superposed on the light-absorbable member so as to cover the opening portion, wherein an annular weld part is formed so as to enclose the opening portion and join the light-absorbable member and the light-permeable member, and the light-permeable member is formed into a thin sheet adhering to the light-absorbable member by deforming at a depressurized state of an interior of the opening portion before the formation of the annular weld part.

Abstract: An object is to identify an abnormal mounted state of a liquid supply unit to a liquid ejection apparatus. There is provided a liquid supply unit configured to supply a liquid to a liquid ejection apparatus that comprises a first electrode assembly including a first electrode and a second electrode; an engagement structure; and a mounting structure which the liquid supply unit is mounted to. The liquid supply unit comprises a liquid supply portion; an engaged structure configured to be engaged with the engagement structure in a mounted state and thereby restrict a motion of the liquid supply unit in a first direction that is a direction of dismounting the liquid supply unit; and an electrically conductive portion provided in the engaged structure.

Abstract: A fluorescence detection apparatus for analyzing samples located in a plurality of wells in a thermal cycler and methods of use are provided. In one embodiment, the apparatus includes a support structure attachable to the thermal cycler and a detection module movably mountable on the support structure. The detection module includes one or more channels, each having an excitation light generator and an emission light detector both disposed within the detection module. When the support structure is attached to the thermal cycler and the detection module is mounted on the support structure, the detection module is movable so as to be positioned in optical communication with different ones of the plurality of wells. The detection module is removable from the support structure to allow easy replacement.

Abstract: A fluorescence detection apparatus for analyzing samples located in a plurality of wells in a thermal cycler and methods of use are provided. In one embodiment, the apparatus includes a support structure attachable to the thermal cycler and a detection module movably mountable on the support structure. The detection module includes one or more channels, each having an excitation light generator and an emission light detector both disposed within the detection module. When the support structure is attached to the thermal cycler and the detection module is mounted on the support structure, the detection module is movable so as to be positioned in optical communication with different ones of the plurality of wells. The detection module is removable from the support structure to allow easy replacement.

Abstract: A liquid ejecting head unit that ejects a liquid from a nozzle, the liquid ejecting head unit including a driving portion that includes an ejection surface on which a plurality of nozzles that eject the liquid are formed; a fixing plate to which a plurality of the driving portions are fixed, and a holder that (Condition 1) is fixed to a support body, which supports the liquid ejecting head unit, and the holder has a conductive property that electrically connects the support body and the fixing plate to one another, or that (Condition 2) includes a portion that projects from the fixing plate in a direction orthogonal to the ejection surface, and houses the plurality of driving portions.

Abstract: Provided is a highly-convenient ink replenishment container. The ink replenishment container includes: a container main body portion capable of containing the ink; and an ink outlet forming portion that is to be attached to an end portion of the container main body portion and at which an ink outlet through which the ink flows out is formed. In a region located outside of the ink outlet, the ink replenishment container includes an erroneous insertion prevention portion that protrudes relative to the ink outlet in a direction opposite to the container main body portion in an axial direction as an axial center, and is configured to be inserted into a recessed portion and to prevent erroneous insertion into the ink tank. The erroneous insertion prevention portion includes protrusions that can be attached and detached, the protrusions are attached and detached in accordance with the shape of the recessed portion.

Abstract: A printhead includes a printhead housing and a handle. The handle is movably coupled to the printhead housing. The handle rotatably moves with respect to the printhead housing between a folded position and the non-folded position. In the folded position, the handle extends along a respective housing surface of the printhead housing. In the non-folded position, the handle extends outward from the respective housing surface of the printhead housing.

Abstract: A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

Abstract: An inkjet printing apparatus includes: a printing head provided with ejection units in each of which ejection port arrays are formed, the ejection units being provided along a first direction; and a suction unit capable of contacting the ejection units and sucking the ejection units while moving relative to the ejection units. A contact region of the suction unit with each of the ejection units does not cover a corner portion among two corner portions of a second ejection unit located at opposite ends of a first end edge thereof on an upstream in a direction of movement, the corner portion being present at a position not overlapping with a second end edge of a first ejection unit on a downstream in the direction of movement when viewed from the direction of movement, the first ejection unit being provided upstream of the second ejection unit in the direction of movement.

Abstract: A method of manufacturing a fluid flow structure may include coupling a flex circuit to a carrier. The flex circuit may include at least one conductor. The method may include coupling an orifice side of a fluidic die to the carrier at an opening on the carrier. The fluidic die may include at least one electrical terminal. The method may include coupling the electrical terminal to the conductor, and overmolding the fluid flow structure with a moldable material. The overmolded fluid flow structure may include a channel molded therein, and the channel may be fluidically coupled to the fluidic die. The conductor may be surrounded by the moldable material.

Abstract: A liquid ejecting apparatus includes a mounting portion on which a liquid container capable of accommodating liquid is mounted in a detachable manner, and a liquid ejecting head configured to eject the liquid which is supplied from the liquid container. The mounting portion has a locking portion capable of locking the liquid container, a movement path extending toward the locking portion, and a first pressing portion and a second pressing portion capable of pressing the liquid container in a direction in which the liquid container is away from the locking portion. The second pressing portion presses the liquid container on the movement path on which the liquid container is away from the locking portion, and the second pressing portion and the first pressing portion press the liquid container when the liquid container is locked by the locking portion.

Abstract: Examples include a glass-based support substrate and at least one fluid ejection die coupled thereto. The at least one fluid ejection die comprises nozzles for dispensing printing material. The glass-based support substrate has a fluid communication channel formed therethrough, where the fluid communication channel is in fluid communication with the nozzles of the at least one fluid ejection die.

Abstract: A continuous ink jet print head, including: a droplet generator (32, 32?, 32?) for generating ink droplets (64); a charging electrode (22, 22?, 22?) having a passageway (74, 74?, 74?) through which the ink droplets travel to receive a charge; a deflection electrode (60, 60?, 60?) for deflecting the charged ink droplets; a gutter (50, 50?, 50?, 50??) having a gutter entrance (52, 52?, 52?, 52??); wherein the passageway is aligned with the gutter entrance through which uncharged droplets enter; and a mounting deck (10, 10?, 10?) configured to secure the gutter entrance into a fixed, nonadjustable gutter entrance position (56, 56?, 56?, 56??) and to secure the charging electrode into a fixed, nonadjustable charging electrode position (24, 24?, 24?) relative to the gutter entrance.

Abstract: A suspended inkjet printing system includes: a pair of support beams extending across a media path; a mounting frame mounted between the support beams, a print head chassis mounted on the mounting frame, the print head chassis being actuable between at least a printing position and a maintenance position; and a plurality of print heads mounted on the print head chassis, each print head extending across the media path and spaced apart along the media path in a direction of media propagation. A plurality of projections extend from the print head chassis into engagement with the mounting frame, the projections controlling a height of the print head chassis relative to the media path.

Abstract: Provided is an application device capable of extracting an imprinting material in which impurities are mixed from a container of the application device and supplying new imprinting material to the container of the application device. An application device according to the present disclosure is used to supply an imprinting material to a substrate in an imprinting apparatus that forms a pattern on the imprinting material on the substrate by using a mold. The application device includes a container unit that contains the imprinting material, and an ejecting unit that is provided on the container unit and that ejects the imprinting material contained in the container unit toward the substrate. The application device is detachably attachable to the imprinting apparatus.

Abstract: An ink delivery device is described. The ink delivery device includes an ink die with a first surface. The ink delivery device also includes an overmold to encapsulate a number of surfaces of the ink die. The overmold has a second surface that is wider than the first surface. The second surface receives an adhesive to attach the ink delivery device to a printhead. The ink delivery device also includes an ink slot passing through the overmold and at least a portion of the ink die.

Abstract: An imaging device or printer for depositing ink on continuously moving media, such as a film web in a vertical fill form seal machine (i.e., a stick pack machine), that allows for printing on multiple print lanes while eliminating the need for shuttling of print heads or expensive lasers. In one embodiment, plurality of print head assemblies are fixed into a grid during a print operation, whereby the grid of print head assemblies are capable of printing within multiple print lanes while the media is continuously moving, without shuttling any of the print heads.

Abstract: A hierarchically aligned inkjet printhead includes a plurality of printhead units and a base holding the printhead units. Each printhead unit includes a plurality of drop ejector array devices, each of which includes at least one drop ejector array; a first butting edge having a first mechanical alignment feature; and a second butting edge having a second mechanical alignment feature. Each printhead unit includes an ink manifold that is fluidically connected to each of the plurality of drop ejector array devices in the printhead unit; and a mounting member to which the drop ejector array devices are affixed. A pair of opposing alignment edges of each printhead unit are substantially parallel to the butting edges of the drop ejector array devices. A first of the opposing alignment edges includes an outwardly-extending projection, and a second of the opposing alignment edges includes a niche that is substantially complementary to the projection.

Abstract: A liquid discharging apparatus capable of performing printing on a medium having a short-side width of A3 or greater, the apparatus including a head unit which includes an exchangeable print head including a discharge unit that discharges a liquid through driving of a drive element, a detection circuit which detects that exchanging of the print head is possible, and a wiring substrate which is provided with a connector and is electrically connected to the print head via the connector, a drive circuit which outputs a drive signal for driving the drive element, and a cable which is connected to the wiring substrate and transfers the drive signal to the print head.

Abstract: A head module supporting member that supports head modules (200) and has a structure in which a longitudinal direction of the head module supporting member is a first direction, and a deflection suppressing unit (112) that has a structure in which a longitudinal direction of the deflection suppressing unit is the first direction, and is disposed on a top surface of the head module supporting member are included. The deflection suppressing unit is an elastic body. A deflection absorption unit (114) connected to the top surface of the head module supporting member, a head module supporting member connection unit (116) connected to an intermediate position of the deflection absorption unit and to the top surface of the head module supporting member, and a biasing force applying unit that applies a biasing force which deflects the deflection absorption unit in a deflection direction of the head module supporting member are included.

Abstract: A liquid jetting device includes a plurality of nozzles from which a liquid can be ejected, a plurality of pressure chambers, each being in fluid communication with an associated nozzle in the plurality of nozzles, actuators associated with each pressure chamber and configured to cause a pressure change in an associated pressure chamber in the plurality of pressure chambers, a heat-conductive chassis to which the plurality of nozzles, the plurality of pressure chambers, and the actuators are mounted, an integrated circuit held inside the chassis and configured to drive the actuators to eject liquid from the plurality of nozzles, a circuit board electrically connected to the integrated circuit and configured supply an electrical signal to integrated circuit, and a heat-conductive support to which the circuit board is mounted, the heat-conductive support held by the heat-conductive chassis to contact the integrated circuit and an inner surface of the heat-conductive chassis.

Abstract: A liquid-consuming apparatus includes: a tank including a liquid chamber, an upstanding wall facing a particular direction, and an inlet formed in a surface of the tank; a liquid-consuming unit consuming liquid stored in the liquid chamber; a cover rotatable between a covering position where the upstanding wall is covered with the cover and an exposure position where the upstanding wall is exposed, around a rotation axis extending in a further direction; and a casing including an engaging target part which holds the cover in the covering position, and supporting the tank, liquid-consuming unit, and cover. The cover includes: an engaging part to engage with the engaging target part in the state that the cover is in the covering position; and a tab which is subjected to an operation for releasing an engagement between the engaging part and the engaging target part.

Abstract: A printing material supply system includes a printing device and a cartridge. The printing device has a cartridge mounting structure. The cartridge is removably attached to the cartridge mounting structure. The cartridge mounting structure has a device-side terminal, a lever, a first device-side locking element and a second device-side locking element. The device-side terminal is configured to contact with a cartridge-side terminal. The first device-side locking element is configured as part of the lever. The second device-side locking element is configured to engage with a second locking surface of a second cartridge-side locking element. The cartridge-side terminal has a cartridge-side contact portion configured to be in contact with the device-side terminal. The cartridge-side contact portion is provided on the negative Z-axis side of the second locking surface.

Abstract: Example circuits and methods are described involving a flexible substrate for a fluid cartridge, comprising an integrated circuit connected to the flexible substrate, and electrical connector pads arranged on the flexible substrate for connection to the integrated circuit.

Abstract: A printhead, comprises: a plurality of element substrates that each include a first element substrate adjacent to a second element substrate in a first direction, wherein a first print element array arranged in the first element substrate includes a first print element that is closest to the second element substrate in the first direction, and a second print element array arranged in the second element substrate includes a second print element closest to the first element substrate in the first direction, and an order of arrangement in the second direction of at least the first print element and a first driving circuit corresponding to the first print element is opposite to an order of arrangement in the second direction of the second print element and a second driving circuit corresponding to the second print element.

Abstract: A liquid ejecting apparatus includes a head that ejects an ink while moving in an X direction, a plurality of liquid retention portions that are arranged in a direction that intersects the X direction and retain the ink, a mounting portion in which the plurality of liquid retention portions are mounted, and a plurality of flow channels that are provided in the mounting portion and supply the ink to the head from the plurality of liquid retention portions, in which the plurality of liquid retention portions include a liquid retention portion that retains a black ink, and, among flow channel lengths of the plurality of flow channels, the flow channel length of a flow channel that supplies the black ink is shortest.

Abstract: A liquid cartridge includes: a front surface facing frontward, a rear surface spaced apart from the front surface, an upper surface facing upward and is disposed between the front surface and the rear surface, a liquid supply portion provided at the front surface, a detection portion, an electrical interface disposed at the upper surface, and an engaging surface. The detection portion includes a light-receiving portion configured to receive incident light thereon. The light-receiving portion is positioned upward relative to the upper surface and configured to change a state of the light depending on a state of the liquid cartridge. The engaging surface faces rearward and configured to be engaged with an external member such that the engagement between the engaging surface and the external member restricts the liquid cartridge from moving rearward. The electrical interface and the engaging surface are positioned frontward relative to the light-receiving portion.