| 摘要 |
A needle holder used in a safety hypodermic syringe, including a hollow cylindrical body having a rear coupling structure adapted to receive a front retaining tip of the plunger of the safety hypodermic syringe with which the needle holder is used, wherein the needle holder has at least one movable unit and at least one engagement unit respectively connected to the hollow cylindrical body, the at least one movable unit being alternatively shifted between an extended-output status where the at least one movable unit is respectively disengaged from the at least one engagement unit, and an inwardly squeezed status where the at least one movable unit is respectively forced by an external force into engagement with the at least one engagement unit.
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