Abstract: A steering device which contracts by an impulse load. A steering device includes an inner column having a cylindrical shape, a base plate having a first hole opened therein, an outer column having a cylindrical shape into which at least a part of the inner column is inserted, and having a slit formed by notching one insertion side end of the inner column, an outer column bracket to tighten the outer column along with a telescopic friction plate, and a connection member provided at a position straddling the first hole and a second hole, and detachably connecting the base plate and the inner column bracket.

Abstract: A steering device which contracts by an impulse load. The steering device includes a cylindrical inner column having a first hole opened therein, an outer column having a cylindrical shape into which at least a part of the inner column is inserted and having a slit at one insertion side end of the inner column, an outer column bracket fixed to a vehicle body side member to support the outer column and to tighten the outer column along with a telescopic friction plate, an inner column bracket having a second hole opened therein and supported by the telescopic friction plate, and a shear pin provided at a position straddling the first hole and the second hole and detachably connecting the inner column and the inner column bracket to each other.

Abstract: A liquid ejection device includes: a liquid ejection opening configured to eject a first liquid; a liquid suction opening arranged in the vicinity of the liquid ejection opening; and a suction unit configured to suck liquid from the liquid suction opening via a suction tube, wherein the liquid ejection device includes a second liquid supply unit, and a second liquid can be supplied into the suction tube.

Abstract: A liquid is ejected to a cellular tissue, and the cellular tissue at a site where the liquid is ejected is dissected with an edge portion. The liquid is ejected in the form of a pulse flow. The liquid is ejected from a nozzle of a liquid ejection device. The edge portion is installed side by side with the nozzle. The site where the liquid is ejected is dissected with the edge portion.

Abstract: An incision is formed at a site where a cellular tissue is to be dissected. A liquid is ejected to the incision. The incision is expanded. The cellular tissue is dissected. The liquid is ejected in the form of a pulse flow. The liquid is ejected in such a way as to advance obliquely to a tangential direction to a surface of the cellular tissue. A site where the liquid is applied to the surface is moved in a direction in which an angle formed by the surface and the direction of advancement of the liquid is greater.

Abstract: A steering device which slides when an impulse load is applied. A steering device includes an inner column having a cylindrical shape, an outer column into which at least a part of the inner column is inserted, a column bracket tightening the outer column, a pressed portion provided on the outer periphery of the inner column, a first tightening mechanism tightening the outer column in response to a rotation of a manipulation lever, a second tightening mechanism biasing a lock member to the pressed portion in a tilt direction in response to the rotation of the manipulation lever, and a separation mechanism. The separation mechanism causes the inner column detachable by changing a relative position between the inner column and the pressing bracket, when the impulse load is applied in a state where the first tightening mechanism and the second tightening mechanism are in work.

Abstract: A steering device which slides when an impulse load is applied. The steering device includes an inner column having a cylindrical shape and a first hole opened therein, an outer column having a slit, an outer column bracket to tighten the outer column, an inner column bracket having a second hole opened therein, and a connection member provided at a position straddling the first hole and the second hole and detachably connecting the inner column and the inner column bracket. The telescopic friction plates are disposed at both sides of the outer column. The inner column bracket includes an arm portion connecting the telescopic friction plates disposed at both sides of the outer column, a neck portion projected from the arm portion, and a leg portion provided at an end opposite to the arm portion of the neck portion and contacting the inner column.

Abstract: Fluid is pressurized and supplied to a fluid chamber with a fluid pressurizing and supplying unit. The pressurized fluid within the fluid chamber is ejected through an injection nozzle by reduction of the volume of the fluid chamber caused by applying a driving voltage to a volume varying unit. In applying the driving voltage to the volume varying unit, the effect imposed on fluid injection by pressure fluctuations of the fluid pressurized and supplied to the fluid chamber is compensated by changing the voltage waveform of the driving voltage. When the pressure of the supply flow amount is decreased to a pressure lower than a predetermined pressure, the time intervals of the driving waveform are corrected. The maneuverability of a fluid injection device does not deteriorate even when the pressure of the fluid pressurized and supplied to the fluid chamber fluctuates.

Abstract: Pulsating flow generating apparatus that changes the volume of a fluid chamber and injects fluid from a fluid injection opening in a pulsed manner, includes: an inlet flow channel for supplying fluid from a fluid supplying unit to the fluid chamber; a volume changing unit that changes the volume of the fluid chamber; an outlet flow channel that delivers the fluid from the fluid chamber to the fluid injection opening; a discharge flow channel that discharges the fluid from the fluid chamber; and an opening and closing valve that opens and closes the discharge flow channel, wherein the synthetic inertance of the discharge flow channel is set smaller than the synthetic inertance of the outlet flow channel, an operation of the volume changing unit is started while closing the opening and closing valve, and the operation of the volume changing unit is stopped while opening the opening and closing valve.

Abstract: Occlusion of a blood vessel is improved by a medical treatment system including a ejection device that includes an insertion section insertable into a tissue of an animal and is capable of ejecting first liquid as a pulsating flow from a distal end of the insertion section and a control apparatus configured to bring the distal end of the insertion section close to a blood vessel in the tissue, which is a medical treatment target, and eject the first liquid as the pulsating flow from the distal end of the insertion section in a state in which second liquid is interposed in a region covering the blood vessel.

Abstract: A fluid ejection device for ejecting a fluid to incise or excise a target includes: a fluid supplying unit which supplies the fluid; an operation unit to which the fluid supplied from the fluid supplying unit continues; a fluid ejection tube which ejects the fluid continuing to the operation unit; an ejection mode selecting unit which allows a predetermined ejection mode to be selected; an acceleration sensor which detects an operation acceleration of the operation unit; and a controller which controls ejection of the fluid, using a preset acceleration that is set on the basis of the ejection mode that is selected, and the operation acceleration detected by the acceleration sensor.

Abstract: A fluid ejecting apparatus includes a handpiece, a fluid supply portion, and a bubble generating portion. The handpiece has a fluid chamber filled with a fluid, and a nozzle for ejecting the fluid in the fluid chamber. The fluid supply portion supplies the fluid to the fluid chamber at a predetermined flow rate through a supply tube. The bubble generating portion ejects the fluid from the nozzle by periodically generating a bubble in the fluid chamber. In a case where a frequency when a bubble is generated by the bubble generating portion is f (Hz) and a maximum volume of a bubble when the bubble during one cycle of driving of the bubble generating portion becomes the maximum is V (ml), the fluid supply portion supplies the fluid to the fluid chamber at the predetermined flow rate exceeding V×f (ml/s).

Abstract: An operation instrument includes an electric surgical knife, a fluid ejection surgical knife, and a gripper mechanism. The gripper mechanism including a pair of gripper strips configured to be openable and closable so as to grip a living tissue and at least one of which is a movable portion. The gripper strips each are provided with an electrode for the electric surgical knife. An ejection opening for the fluid ejection surgical knife is formed in a first gripper strip, and the ejection opening is formed at a position retracted from an end portion on a distal end side of the electrode.

Abstract: A fluid ejection device includes a fluid ejection tube having a forward end nozzle inserted into an abdominal cavity. The fluid ejection tube, accommodated in a cylindrical casing section, is movable in an extending direction. The fluid ejection tube moves in the extending direction, interlocked with a sliding operation of a sealing state switching operation section on the outside of the casing section. Fixed and sliding sealing sections, which seal the inside of the abdominal cavity off from outside, are arranged between the fluid ejection tube and an inner wall surface of the casing section. The fixed and sliding sealing sections shift from a first sealing state with a first airtightness to a second sealing state with a higher airtightness, through movement of the fluid ejection tube by the sealing state switching operation section. The fluid ejection device is electrically drivable when the second sealing state is established.

Abstract: A fluid ejection method includes: supplying fluid at a predetermined fluid supply flow rate to a pressure chamber; generating a pulsed flow by varying the volume of the pressure chamber at a predetermined frequency; and ejecting the pulsed flow, wherein the fluid supply flow rate is proportional to the frequency.

Abstract: Pulsating flow generating apparatus that changes the volume of a fluid chamber and injects fluid from a fluid injection opening in a pulsed manner, includes: an inlet flow channel for supplying fluid from a fluid supplying unit to the fluid chamber; a volume changing unit that changes the volume of the fluid chamber; an outlet flow channel that delivers the fluid from the fluid chamber to the fluid injection opening; a discharge flow channel that discharges the fluid from the fluid chamber; and an opening and closing valve that opens and closes the discharge flow channel, wherein the synthetic inertance of the discharge flow channel is set smaller than the synthetic inertance of the outlet flow channel, an operation of the volume changing unit is started while closing the opening and closing valve, and the operation of the volume changing unit is stopped while opening the opening and closing valve.

Abstract: A fluid ejection device includes: a fluid chamber; a volume varying unit configured to vary the volume of the fluid chamber; a fluid supplying unit configured to supply fluid to the fluid chamber at a predetermined pressure; and an ejection command switching unit configured to switch a fluid ejection between a pulsed flow ejection which ejects the fluid in a pulsed manner by activating the volume varying unit and varying the volume of the fluid chamber and a continuous flow ejection which ejects the fluid with a fluid supply pressure from the fluid supplying unit higher than that in the case of the pulsed flow ejection in a state in which the volume varying unit is stopped.

Abstract: A fluid ejection device includes a pulsating flow generation section adapted to eject a fluid in a pulsed manner; a fluid supply section adapted to supply the pulsating flow generation section with the fluid; a fluid supply tube having flexibility adapted to communicate the pulsating flow generation section and the fluid supply section with each other; and a drive control section adapted to perform drive control of the pulsating flow generation section and the fluid supply section, wherein the drive control section starts up the pulsating flow generation section, makes the fluid supply section supply the fluid at a first flow rate for a predetermined time period, and then makes the fluid supply section supply the fluid at a second flow rate lower than the first flow rate after the predetermined time period elapses.

Abstract: A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit which detects the level of vibration of the component in the vicinity of the fluid ejection opening; and an operation control unit which controls operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit.

Abstract: A liquid injection device includes: a chamber which supply of the liquid and connects with the injection nozzle; a chamber volume varying unit to which driving voltage is applied to reduce the volume of the chamber to a volume smaller than the volume of the chamber before the driving voltage is applied; a driving voltage applying unit which applies the driving voltage to the chamber volume varying unit with the liquid supplied to the chamber; a pseudo noise data memory unit which stores sound data of pseudo noise having audible frequency components contained in driving noise generated when the driving voltage is applied to the chamber volume varying unit; and a pseudo noise outputting unit which outputs the pseudo noise by using the sound data of the pseudo noise such that the sound pressure of the driving noise decreases within the audible frequency range when the driving voltage is applied.