Abstract: Providing a liquid ejection head ejecting a liquid from an ejection port by applying energy to the liquid, in which the ejection port includes an opening portion having a longitudinal direction and a transverse direction, the opening portion includes a protrusion, first regions, and a second region, the protrusion is arranged in each of facing positions of the ejection port in the longitudinal direction, the first regions are regions excluding the protrusions of the ejection port that are along the longitudinal direction and partitioned by the protrusions, the second region is a region excluding the protrusions of the ejection port that bridges the first regions between the facing protrusions, and M/L>1.0 and (L?a)/2L<0.4 are satisfied where the maximum length in the longitudinal direction is M, the maximum length in the transverse direction is L, and a half width of the protrusion is a.

Abstract: A liquid ejection head includes a printing element substrate including an ejection surface provided with a first ejection orifice array in which ejection orifices configured to be capable of ejecting a liquid are arranged in plurality in an array direction and a second ejection orifice array arranged in a direction intersecting with the array direction and the first ejection orifice array; and a protective member provided with a first opening corresponding to the first ejection orifice array and a second opening corresponding to the second ejection orifice array. The protective member is arranged adjacent to the ejection surface of the printing element substrate via an adhesive arranged between the first ejection orifice array and the second ejection orifice array.

Abstract: A liquid ejection head includes a print element substrate having an ejection port forming member including an ejection surface on which a plurality of ejection port arrays for ejecting liquid are formed and a protection member having an opening corresponding to one of the ejection port arrays, the protection member is provided with at least one recessed portion at an end parallel to a direction of the plurality of ejection port arrays in a direction orthogonal to the plurality of ejection port arrays and a projection portion projecting in the direction orthogonal to the plurality of ejection port arrays, the projection portion is provided inside the at least one recessed portion, and the ejection port forming member has a corresponding recessed portion corresponding to the projection portion in the direction orthogonal to the plurality of ejection port arrays.

Abstract: A liquid ejection device has an element substrate having an ejection port; and a voltage application unit applying a voltage to the element substrate, wherein the element substrate has a first layer having the ejection port and a first channel communicating with the ejection port and a second layer fixed to a back face of the first layer and having a second channel communicating with the first channel, a heat element for ejecting the liquid, a first electrode covering a surface of the heat element on a side of the first layer and exposed to the first channel, and a second electrode exposed to the first channel at a position different from the first electrode and not overlapping the heat element on a plan view, and the voltage application unit is configured to apply the voltage so that the first electrode is at a negative potential.

Abstract: A liquid ejection head includes a print element substrate having an ejection port surface in which a plurality of ejection ports are arranged and a temperature control unit that controls a temperature of the ejection port surface. The print element substrate ejects a liquid from the plurality of ejection ports onto a medium moved by the liquid ejection head relatively to the liquid ejection head. The ejection port surface includes a region on a downstream side of the ejection port surface in a direction in which the medium relatively moves when the medium is viewed from the liquid ejection head, and includes a region on an upstream side of the ejection port surface in the relative moving direction. The temperature control unit control the temperature of the ejection port surface so that a temperature of the downstream side region becomes higher than a temperature of the upstream side region.

Abstract: A liquid ejection head includes an element substrate provided with an ejection port row in which ejection ports are arrayed. The port includes a protruding portion protruding toward a center of the ejection port, an energy generation element configured to generate energy to eject liquid, and a pressure chamber including the energy generation element thereinside. The head has a liquid supply path for supplying liquid to the pressure chamber, and a liquid collecting path for collecting liquid from the pressure chamber. A direction in which the protruding portion protrudes is substantially parallel to a flow direction of liquid in the pressure chamber flowing from the liquid supply path to the liquid collecting path via the pressure chamber. The flow direction is same direction in the pressure chambers, and is same direction as a relative moving direction of a medium that receives liquid ejected from the liquid ejection head.

Abstract: Volume data is formed by an ultrasound probe transmitting and receiving ultrasound to and from a treatment target. The volume data has coordinate information indicating each position of the volume data based on a position and an orientation of the ultrasound probe during ultrasound transmission and reception. A treatment tool position/orientation detection unit is configured to specify a position and an orientation of a treatment tool in a data space of the volume data in a case in which the treatment on the treatment target is performed. A reconstruction processing unit is configured to form a reconstructed ultrasound image from the volume data with reference to the position and the orientation of the treatment tool in the data space of the volume data. A display controller is configured to display the reconstructed ultrasound image on a display.

Abstract: A method for removing kogation, the method includes removing kogation accumulated on a surface of the upper protective layer by applying a voltage in a state where the upper protective layer is used as an anode electrode and a portion connectable to the upper protective layer via the ink is used as a cathode electrode, wherein removing kogation is performed under a first condition including applying the voltage over a first time, and then is performed under a second condition including applying the voltage over a second time longer than the first time.

Abstract: An operation part for a medical device includes: an exterior member; an operation lever provided in an operation part main body, which is a first region of the exterior member, rotatably about a rotation shaft in a state of being erected in a Z(+) direction; one arc surface that is provided in a grip part, which is a second region on a base end part side of the operation part main body, and that has a normal component on a Z(-) side; another arc surface that is provided in the operation part main body, has a normal component on the Z(-) side, and that has a distance to a longitudinal axis equal to or less than a distance from the arc surface to the longitudinal axis; and a locking part provided on a distal end part side of the rotation shaft of the operation lever and on the Z(-) side.

Abstract: A liquid ejection head includes a printing element board having an ejection surface in which an ejection orifice array is formed to eject liquid; and a protective member having an opening corresponding to the ejection orifice array, wherein the shape of the opening is an elongate shape having a longitudinal direction and a transverse direction in the case of viewing from the ejection surface, the opening has a first side surface parallel to the longitudinal direction and a second side surface parallel to the transverse direction, and the protective member is fixed to the ejection surface such that the first side surface has an inclination angle with the ejection surface.

Abstract: A lead frame includes a support portion that has one end on which a first part and a second part that has a smaller thickness than the first part are arranged, a lead, and a heat sink that is welded to the support portion in the second part. A method of manufacturing the lead frame includes forming, from a metal plate, a frame member that includes a support portion and a lead, where the support portion has one end on which a first part and a second part that has a smaller thickness than the first part are arranged, and welding a heat sink to the support portion in the second part.

Abstract: Provides a technique that can suppress occurrence of the image unevenness and the like due to a burnt ink on a heater surface. To this end, between aging processing and printing processing, preprocessing is performed with a potential difference between a potential difference during aging processing and a potential difference during printing processing.

Abstract: Provided is a liquid ejection apparatus capable of executing a kogation removal process at appropriate timing, thereby stably ejecting a liquid without shortening the lifespan of a head. For this purpose, the timing to execute the kogation removal operation of dissolving a metal in a protective layer through an electrochemical reaction with the liquid is determined based on information on an ejection characteristic of the liquid.

Abstract: Provided is a technique for achieving stable ejection characteristics. To this end, during liquid ejection, a potential difference ?Va is generated between an electrode and an opposing electrode, the potential difference ?Va being different between a liquid ejection head in a brand-new state and a liquid ejection head which has performed a kogation removal operation before.

Abstract: Provided is a technique capable of obtaining stable ejection characteristics. For this purpose, as a potential difference between an electrode 121 and a counter electrode 129 in an aging process, different potential differences ?Va are used for a brand-new liquid ejection head and a liquid ejection head having undergone a kogation removal operation.

Abstract: A medical instrument including a first region provided with a first marker, an intermediate region not provided with a marker, and a second region provided with a second marker, which are disposed in a longitudinal direction, wherein: the first marker includes plural first pattern rows arranged along a direction that intersects with the longitudinal direction, the second marker includes plural second pattern rows arranged along the direction that intersects with the longitudinal direction, each pattern rows being configured by plural symbols arranged along the longitudinal direction, and an arrangement of the symbols in each pattern row being different from an arrangement of the symbols in any pattern row adjacent thereto.

Abstract: An ultrasound probe inserted into a body cavity includes: an ultrasound transducer that radiates an ultrasound wave; and a case that has a substantially cylindrical shape and that accommodates the ultrasound transducer. The case includes a direction marker that is a surface indicating a radiation direction of the ultrasound wave. The direction marker is provided at a position where the direction marker is visible from an outside and at least a portion of the direction marker overlaps a radiation range of the ultrasound wave in an axial direction.

Abstract: An ultrasound probe inserted into a body cavity includes: an ultrasound transducer that radiates an ultrasound wave; and a case that accommodates the ultrasound transducer. The case includes a first puncture guide that is a hole or a notch into which a puncture needle is inserted and that guides a puncture direction of the puncture needle, and a guide marker that is provided on an outer surface of the case and that indicates a guide direction of the puncture guide.

Abstract: An ultrasound probe includes an ultrasound transducer that radiates an ultrasound wave, and a case that has a substantially cylindrical shape and that accommodates the ultrasound transducer, and the case includes one or more range markers that are provided at positions visible from an outside and that indicate a radiation range of the ultrasound wave.

Abstract: A liquid ejection head includes a print element substrate having an ejection port surface in which a plurality of ejection ports are arranged and a temperature control unit that controls a temperature of the ejection port surface. The print element substrate ejects a liquid from the plurality of ejection ports onto a medium moved by the liquid ejection head relatively to the liquid ejection head. The ejection port surface includes a region on a downstream side of the ejection port surface in a direction in which the medium relatively moves when the medium is viewed from the liquid ejection head, and includes a region on an upstream side of the ejection port surface in the relative moving direction. The temperature control unit control the temperature of the ejection port surface so that a temperature of the downstream side region becomes higher than a temperature of the upstream side region.