| 摘要 |
This liquid-administering instrument (10) is provided with: an internal structure (1) provided with an inner cylinder (3) capable having an interior thereof filled with a liquid, a double-ended needle (71), and an outer cylinder (4); an operation member (5) for performing a pressing operation which causes the liquid to be discharged from the double-ended needle (71); a cover member (6) capable of moving between a position (A) in which a needle tip of the double-ended needle (71) is covered, and a position (B) in which the needle tip is exposed; a coil spring (13) which impels the cover member (6) in an end direction; a lock part (50) which, when the cover member (6) moves from position (B) to position (A), and the movement amount of the cover member (6) reaches a lockable movement amount, restricts movement of the cover member (6) towards position (B); and a movement-amount restriction part (80) which restricts the movement amount of the cover member (6) such that the movement amount of the cover member (6) does not reach the lockable movement amount until the cover member (6) is positioned in position (B) and the pressing operation is complete. |
