| 摘要 |
A safety syringe with a needle retraction device includes a syringe cylinder, a push rod inserted in the syringe cylinder to push the medicinal liquid, a seat disposed at a front end of the syringe cylinder to receive a syringe needle, wherein the push rod includes a pushing knob with a through bore mounted at a top end thereof; and the seat includes a connection unit provided at a rear end thereof, the pushing knob allows to be pushed into the connection unit, because the pushing knob is pressed to reduce its outer diameter by using the through bore, thereby prevent injuring medicinal personals and obtaining safe protection.
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