Drive mechanism
First Claim
1. A drive mechanism for a medication delivery device, comprising a motor, a housing, a gear cover connected to the housing, a gear transmission system disposed in a space defined by the housing and the gear cover, a helical transmission system disposed in an interior of the housing and connected to the motor by the gear transmission system, and a sensor system,wherein the helical transmission system comprises a plug, a screw shaft disposed in an interior of the plug, and a sliding block threadingly connected with the screw shaft, the sliding block being attached to or integrally formed with the plug;
- wherein the motor is configured to rotate the screw shaft of the helical transmission system via the gear transmission system, to thereby move the plug along a linear path relative to the housing;
wherein the sensor system is configured to monitor a driving process of the drive mechanism; and
wherein the housing comprises a first receiving portion for receiving the gear transmission system, and a second receiving portion, perpendicular to the first receiving portion, for receiving the plug;
the first receiving portion defines an opening at a side remote from the second receiving portion and has an internal space in communication with an internal space of the second receiving portion;
the gear cover is mounted to the first receiving portion;
a first through hole is defined in an outer surface of the first receiving portion at a location adjacent the second receiving portion, the motor is perpendicularly disposed on the outer surface of the first receiving portion, with its output shaft passing through the first through hole, the gear transmission system is disposed within the first receiving portion and the gear cover, and the helical transmission system is disposed within the second receiving portion.
2 Assignments
0 Petitions
Accused Products
Abstract
A drive mechanism for a medication delivery device includes a motor, a housing, a gear cover, a gear transmission system, a helical transmission system, and a sensor system. The helical transmission system includes a plug, a screw shaft, and a sliding block connecting the plug to the screw shaft. The gear transmission system includes a first gear disposed on an output shaft of the motor and a second gear disposed on one end of the screw shaft. Dual gears interconnect the first and second gears. The motor drives the plug along a linear path by rotating the screw shaft via the gear transmission system, causing the sliding block to move along the screw shaft. The sensor system monitors the driving process. The plug provides the force required to effect the dosing of the medication.
9 Citations
14 Claims
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1. A drive mechanism for a medication delivery device, comprising a motor, a housing, a gear cover connected to the housing, a gear transmission system disposed in a space defined by the housing and the gear cover, a helical transmission system disposed in an interior of the housing and connected to the motor by the gear transmission system, and a sensor system,
wherein the helical transmission system comprises a plug, a screw shaft disposed in an interior of the plug, and a sliding block threadingly connected with the screw shaft, the sliding block being attached to or integrally formed with the plug; -
wherein the motor is configured to rotate the screw shaft of the helical transmission system via the gear transmission system, to thereby move the plug along a linear path relative to the housing; wherein the sensor system is configured to monitor a driving process of the drive mechanism; and wherein the housing comprises a first receiving portion for receiving the gear transmission system, and a second receiving portion, perpendicular to the first receiving portion, for receiving the plug;
the first receiving portion defines an opening at a side remote from the second receiving portion and has an internal space in communication with an internal space of the second receiving portion;
the gear cover is mounted to the first receiving portion;
a first through hole is defined in an outer surface of the first receiving portion at a location adjacent the second receiving portion, the motor is perpendicularly disposed on the outer surface of the first receiving portion, with its output shaft passing through the first through hole, the gear transmission system is disposed within the first receiving portion and the gear cover, and the helical transmission system is disposed within the second receiving portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification