| 摘要 |
FIELD: medicine. ^ SUBSTANCE: invention refers to medical equipment, namely to a dose setting mechanism for an automatic handle syringe, particularly to built-in axial and radial dose setting mechanisms for the handle syringe. The dose setting mechanism for an injection device comprises torsion spring to facilitate the drug dose introduction from the injection devices. The dose setting mechanism comprises a first cam dose increasing groove and a first cam dose decreasing groove. The first cam dose increasing groove can be received and coupled with a first dose increasing key. And the first cam dose decreasing groove and the first dose increasing key interact to strain the torsion spring of the injection device when turning a dose setting element in the first direction. The first cam dose decreasing groove can be received and coupled with the first dose decreasing key. And the first cam dose decreasing groove and the first dose decreasing key interact to release the torsion spring of the injection device when turning the dose setting element in the second direction. And the second turn direction is opposite to the first turn direction. ^ EFFECT: design of the dose setting mechanism for the automatic handle syringe. ^ 9 cl, 5 dwg |
