| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow channel opening/closing device and a liquid injection device capable of surely implementing an opening/closing motion by improving a foreign matter dischargeability by stirring a liquid and reducing growth of deposit in accompany with opening/closing.SOLUTION: A flow channel opening/closing device includes a cover member, and a receiving member 33 fixed to the cover member. The receiving member 33 has a first wall 201 defining a flow channel outlet 121a opened toward the cover member, and a second wall 202 surrounding the first wall 201. The cover member is brought into contact with the first wall 202 by relative movement to the receiving member 33 to close the flow channel outlet 121a, and a surface facing the cover member, of the surface of the first wall 201 and a surface facing the cover member, of the surface of the second wall 202 are partitioned by a step 203.SELECTED DRAWING: Figure 4 |
