| 摘要 |
A safety needle-bearing medical device (10) is provided. After use the needle (50) is retracted into the housing (20) of the device to prevent inadvertent contact with the contaminated needle. The invention provides a syringe having a retractable needle. At the end of the injection stroke, the plunger (30) engages a needle retainer that releasably retains the needle. The needle (50) is then released, and a biasing element (60) biases the needle rearwardly. In a preferred embodiment, the needle retainer comprises an adhesive (65) having sufficient strength to retain the needle (50) against the bias of the biasing element (60) prior to actuation of retraction. In addition, the bond of the adhesive (65) is sufficiently fracturable to allow release of the needle upon application of the actuation forced by the plunger (30). |
