An electric injection device at least comprises an outer case, a drive mechanism, a transmission mechanism, a linkage mechanism and a push mechanism. The drive mechanism, the transmission mechanism, the linkage mechanism and the push mechanism are all assembled in the outer case, and the drive mechanism is used to drive the transmission mechanism. The transmission mechanism can transmit power to rotate a push block regularly and drive a brake end of the linkage mechanism continuously. The push mechanism comprises at least a pushing shaft and a pushing element. The brake end can continuously push the pushing element, and the pushing element propels the pushing shaft to further push a syringe assembled on the outer case, so as to use electric injection instead of manual injection to complete the syringe.

A drive mechanism for a medication delivery device containing a resilient member and having a rotation member configured to be rotated in a first direction during setting of a dose of a medication and to be rotated in a second direction during delivery of the dose, where the rotation member is coupled to a drive member that is coupled to a piston rod such that on dose delivery the piston rod is displaced in a distal direction to dispense a medicament and where the resilient member prevents movement of the drive member and the piston rod during dose setting.

A medication injection pen, including a housing, a dose set knob (DSK) comprising an internal key, and a dose stop member engaging the dose set knob. Rotation of the dose set knob to set a medication dose causes rotation of the dose stop member with respect to the dose set knob, and when the dose set knob is rotated to a last dose setting position, the dose stop member rotationally abuts the internal key thereby preventing further rotational movement of the dose set knob in a dose setting direction.

A crawling mechanism for a drug delivery device has a central longitudinal axis and is arranged to crawl in an axial direction. The crawling mechanism includes a housing and one or more swing members pivotally coupled to the housing that are arranged to swing relative to the housing between an initial position and a terminal position suitable for urging crawling of the mechanism.

The present disclosure relates to a dosing mechanism for a drug delivery device for selecting and dispensing a number of user-variable doses of a medicament. The dosing mechanism comprises a housing, a piston rod, and a driving mechanism for rotating the piston rod and/or a movement application component, which is directly engaged with the piston rod, in a dispense rotational direction with respect to the housing for dose dispense. The dosing mechanism further comprises a rotational end stop mechanism for terminating dose dispense with a first engagement means, which is rotationally fixed with respect to the piston rod and/or the movement application component, and a second engagement means, which is prevented from rotation with respect to the housing in the dispense rotational direction at an end of dose dispense. In order to improve the dose delivery accuracy, the second engagement means directly engages the first engagement means. disclosure

A medicine injection pen includes a rotatable drive member and a rotary encoder associated with the drive member. The rotary encoder is configured to determine an amount of liquid medicine dispensed based on a rotational orientation of the drive member.

A medication injection method where a dose set knob of a medication injection pen is rotated with respect to the housing of the medication injection pen during dose setting and dose correcting, a driver is selectively engages with the dose set knob, the driver being rotatably fixed with respect to the housing during dose setting and dose correcting, the driver is moved axially with the dose set knob during the dose setting and the dose correcting, and the driver is rotated with the dose set knob during an injection.

A medicine injection pen includes a rotatable drive member and a rotary encoder associated with the drive member. The rotary encoder is configured to determine an amount of liquid medicine dispensed based on a rotational orientation of the drive member.

Syringe assemblies are described herein. A syringe assembly includes an assembly housing, a first syringe, a second syringe, and a connecting gear. The first syringe is disposed within the assembly housing. Each plunger is movable within the respective syringe cavity and defines a respective chamber in the respective syringe cavity, wherein the respective chamber is in fluid communication with the respective syringe port, the respective plunger comprising a respective gear rack extending longitudinally along the respective plunger. The connecting gear is rotatably coupled to the assembly housing. The connecting gear is configured to be in meshed engagement with at least one of the first gear rack and the second gear rack of the syringes.

Syringe assemblies are described herein. A syringe assembly includes an assembly housing, a first syringe, a second syringe, and a connecting gear. The first syringe is disposed within the assembly housing. Each plunger is movable within the respective syringe cavity and defines a respective chamber in the respective syringe cavity, wherein the respective chamber is in fluid communication with the respective syringe port, the respective plunger comprising a respective gear rack extending longitudinally along the respective plunger. The connecting gear is rotatably coupled to the assembly housing. The connecting gear is configured to be in meshed engagement with at least one of the first gear rack and the second gear rack of the syringes.