| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tube pump which can suck and discharge a liquid from one end of a tube by a simple constitution, and to provide a liquid injection device. <P>SOLUTION: The liquid injection device includes the tube 62, a frame 63 and a pressing roller 67. The tube 62 has an opening part 62a formed on one end side in a length direction which enables suction and discharge of the ink, and a blocking part 62b formed on the other end side in the length direction. Moreover, at least an intermediate part 62c in the length direction has an elasticity. The frame 63 has a supporting surface 63d of a circular arc shape in cross section which can support the intermediate part 62c of the tube 62 along the length direction. The pressing roller 67 can freely perform circular motion around a driving shaft 65 to be the arc center of the supporting surface 63d between a holding region B and a non-holding region A. The pressing roller 67 can perform circular motion in either one direction of a direction to approach the opening part 62a in the length direction of the tube 62 and a direction to approach the blocking part 62b. The pressing roller 67 moves in the holding region B by performing circular motion in one direction, and then further moves to the non-holding region A by performing circular motion in one direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
