| 摘要 |
<p>A medical injector including a body having a distal end and a proximal end, and a plunger displaceably disposed in the body. The plunger includes a plurality of spaced-apart ratchet teeth disposed along the length thereof. The plunger selectively displaces a stopper to dispense a medicament from said medical injector. The medical injector also includes an indexer disposed within the body to engage the plunger to permit distal displacement of the plunger and substantially prevent proximal displacement of the plunger, an actuator having an engagement portion to engage the plunger to permit proximal displacement of the actuator relative to the plunger and substantially prevent distal displacement of the actuator relative to the plunger, and a rotating member for proximally displacing the engagement portion relative to the plunger and the body.</p> |
