JP2003019455A5 - - Google Patents

Claims (11)

A first actuator for axially moving the piston and the housing;
A sleeve containing at least a part of the piston and having a space penetrating in the axial direction;
A second actuator for axially moving the sleeve and the housing;
A third actuator for relatively rotating the cylinder and the housing or the piston and the housing;
Driving units for driving the first, second, and third actuators, respectively;
A pump chamber formed of the piston, the sleeve, and the housing and rotating the cylinder and the housing or the piston and the housing relative to each other by driving the third actuator;
A fluid discharge device comprising a fluid suction port and a discharge port communicating between the pump chamber and the outside of the pump chamber.   2. The fluid ejection device according to claim 1, further comprising a screw groove formed on a relative movement surface between the sleeve and the housing and performing a pumping action for pumping the fluid from the suction port side to the discharge port side. . The fluid discharge device according to claim 1, wherein the cylinder and the housing are configured so that a flow path resistance of the fluid communicating between the pump chamber and the outside is changed by relative movement of the sleeve and the housing. 2. The fluid according to claim 1, wherein the first actuator and the second actuator are independently driven to move the piston and the sleeve relatively in opposite directions when fluid discharge starts or ends. Discharge device. The first actuator is disposed on the opposite side to the discharge side of the fluid discharge device, the second actuator capable of rotating and linearly moving is disposed on the discharge side, and rotated on the discharge side and an intermediate portion on the opposite side. The fluid ejection device according to claim 1, wherein the third actuator that is a motor is disposed. The fluid ejection device according to claim 1, wherein the first actuator is detachable from a fluid ejection device body. An electrostrictive element which is a second actuator having one end on the front side and the other end on the rear side, a piston penetrating the electrostrictive element, a first actuator for driving the piston in the axial direction, and the electromagnetic A housing for housing the strain element and the piston and holding the fixed side of the first actuator; a sleeve pressed to the front side of the electromagnetic strain element; and a front cylinder for rotatably supporting the sleeve; The piston and the sleeve are configured to be movable in the axial direction, and the third actuator that rotates any of the piston and the sleeve, and the first, second, and third actuators are driven. The drive section, the sleeve, and the pump chamber formed by the front cylinder are in communication with each other. In the fluid ejecting device comprising inlet and outlet of the fluid,
  2. The fluid according to claim 1, wherein a gap of a flow path formed between the sleeve and the housing and between the piston and the housing is changed by driving the second actuator and the first actuator. Discharge device. Fluid is sucked from a suction port into a pump chamber formed by a piston, a sleeve for housing the piston, and a housing,
  The first actuator moves the piston and the housing relatively in the axial direction, and the second actuator moves the piston and the sleeve relatively in the axial direction. At the same time, the third actuator moves the cylinder and the housing, or A fluid discharge method, wherein the fluid in the pump chamber is discharged from a discharge port while relatively rotating a piston and the housing. 9. The flow according to claim 8, wherein the piston and the sleeve are driven using a dissimilar curve with respect to the time axis at the start or end of drawing during fluid discharge. Body discharge method. 9. After the fluid discharge process is completed, the relative position between the tip of the discharge port and the facing surface is changed while the gap between the discharge port and the facing surface is maintained constant, and the process proceeds to the next fluid discharging process. The fluid discharge method described in 1. The fluid discharge method according to claim 8, wherein transition from continuous fluid discharge to intermittent fluid discharge, or from intermittent fluid discharge to continuous fluid discharge, is performed by selecting a displacement curve of the piston and the sleeve.