Tube pump and ink jet recording apparatus incorporating the same
AssigneeSeiko Epson Corporation
InventorsShuhei Harada, Atsushi Kobayashi
Life of this patent
Estimating the term…
Abstract
In a tube pump, a rotor is fixed to a drive shaft so as to rotate therewith. A tube pressing member is swingable in an axial direction of the drive shaft. A swinging member swings the tube pressing member in accordance with the rotation of the rotor. An upper outer face of a tube is fixed to a lower portion of the tube pressing member. A lower outer face of the tube is fixed to a fixing member. The tube is forcibly pressed and expanded in accordance with the swing motion of the tube pressing member, while the pressed/expanded part is shifted in an extending direction.
Claims39
A tube pump, comprising:
- a drive shaft;
- a rotor, fixed to the drive shaft so as to rotate therewith;
- a tube pressing member, being swingable in an axial direction of the drive shaft;
- a swinging member for swinging the tube pressing member in accordance with the rotation of the rotor;
- a tube, an upper outer face of which is fixed to a lower portion of the tube pressing member;
- a fixing member, to which a lower outer face of the tube is fixed,
- wherein the tube is forcibly pressed and expanded in accordance with the swing motion of the tube pressing member, while a pressed/expanded part of the tube is shifted in an extending direction of the tube.
A tube pump, comprising:
- a pump shaft, provided as a fixed central shaft;
- a tube, wound around the pump shaft, the tube being deformable in a radial direction of the pump shaft;
- an inner cylindrical member, for surrounding the tube therein;
- an outer cylindrical member, being rotatable around the pump shaft, while defining an annular passage between the inner cylindrical member;
- and
- a ball body, provided in the annular passage while being movable therein in accordance with the rotation of the outer cylindrical member,
- wherein the inner cylindrical member is eccentrically swung by the movement of the ball body, while deforming the tube.
A tube pump, comprising:
- a pump shaft, provided as a rotary central shaft;
- an inner cylindrical member, for defining an annular passage between the pump shaft;
- a tube, wound around the inner cylindrical member, the tube being deformable in a radial direction of the pump shaft;
- an outer cylindrical member, being fixed with respect to the pump shaft, while surrounding the tube therein;
- and
- a ball body, provided in the annular passage while being movable therein in accordance with the rotation of the pump shaft,
- wherein the inner cylindrical member is eccentrically swung by the movement of the ball body, while deforming the tube.
A tube pump, comprising:
- a pump shaft, provided as a fixed central shaft;
- a first cylindrical member, being rotatable around the pump shaft;
- a second cylindrical member, for defining an annular passage between the first cylindrical member;
- a tube, wound around the second cylindrical member, the tube being deformable in a radial direction of the pump shaft;
- a third cylindrical member, being fixed with respect to the pump shaft while surrounding the tube therein;
- and
- a ball body, provided in the annular passage while being movable therein in accordance with the rotation of the first cylindrical member,
- wherein the second cylindrical member is eccentrically swung by the movement of the ball body, while deforming the tube.
Dependencies are inferred from the claim text.