Lifter assembly
AssigneeJohnson Electric S.A.
InventorsMohanlal Ramadoss, Wai To Li, Yue Fu Zhu, Xiang Dong Jiang
Life of this patent
Estimating the term…
Abstract
A lifter assembly for actuating a needle of an automatic medication delivery device, includes a motor, a speed reduction device driven by the motor, an output shaft driven by the speed reduction device via a rigid transmission device, a driving lever configured to move the needle, the driving lever being connected to and driven by the output shaft, and a sensing device configured to sense the rotation position of the output shaft. The speed reduction device comprises a worm in mesh with a worm gear. The output shaft, the worm gear and the rigid transmission device cooperatively constitute a four-bar linkage mechanism.
Claims12
A lifter assembly for actuating, a needle of an automatic medication delivery device the lifter assembly comprising:
- a motor having a motor shaft;
- a speed reduction device driven by the motor shaft and configured to reduce the rotational speed of the motor shaft;
- an output shaft driven by the weed reduction device via a rigid transmission device:
- a driving lever configured to move the needle the driving lever being connected to and driven by the output shaft;
- and
- a sensing device configured to sense the rotational position of the output shaft such that a position of the needle is precisely controlled,
- wherein the speed reduction device comprises a worm and a worm gear in mesh with the worm, the rigid transmission device comprising two parts pivotably connected with each other, one of the parts being pivotably connected to a portion of the worm gear offset from the center of the worm gear, the other of the parts being fixed to the output shaft and pivotable about an axis of the output shaft.
A lifter assembly for actuating a needle of an automatic medication delivery device, the lifter assembly comprising:
- a motor having a motor shaft;
- a speed reduction device driven by the motor shaft and configured to reduce the speed of the motor shaft, the speed reduction device comprising a worm and a worm gear in mesh with the worm;
- an output shaft driven by the speed reduction device via a rigid transmission device;
- a driving lever configured to move the needle, the driving lever being connected to and driven by the output shaft;
- and
- a sensing device configured to sense the rotational position of the output shaft;
- wherein the worm gear comprises a connection structure offset from the center of the worm gear,
- wherein the rigid transmission device comprises an arm having one end fixed to the output shaft and the other end extending away from the output shaft, and a linkage lever having two opposite ends respectively pivotably attached to the other end of the arm and to the connection structure of the worm gear, the arm being pivotable about an axis of the output shaft.
Dependencies are inferred from the claim text.