| 摘要 |
A protective cover for arterial or a similar needle is effective for covering the needle tip and also can be retracted along the needle shaft to uncover and reopen the needle. The cover has a sheath section, whose movement along the shaft is controlled by an actuator section. The sheath section has two through channels and the actuator section has an actuator element with a corresponding channel opening. In the open position, that is when the needle tip is exposed, the channels within the sheath section and the channel opening of the actuator element are aligned and the needle shaft extends through the channels and the opening. To enclose the needle tip, the cover is slid along the needle shaft to the tip, so that the actuator section is slid off the shaft. At this point, a spring within the actuator section compels the actuator element upward, effectively locking the tip within the cover. Pushing down on the actuator element, realigns to channels and channel opening and permits the cover to be slid back on the shaft and retracted off the tip, reopening the needle. A tether is provided to limit the movement of the cover along the needle shaft.
|
