Electronic injection pen

Abstract

The invention discloses an electronic injection pen. The electronic injection pen comprises a pen shell, a first driving mechanism, a medicinal liquid cylinder assembly, a needle changing mechanism, asecond driving mechanism, a sensing control unit, a bottle changing switch assembly and a battery unit, wherein the various mechanisms, assemblies and units are mounted in an inner cavity of the penshell; the needle changing mechanism is positioned at the front end of the pen shell; the medicinal liquid cylinder assembly is positioned on the rear side of the needle changing mechanism; the firstdriving mechanism is positioned on the rear side of the medicinal liquid cylinder assembly; the sensing control unit is connected with the first driving mechanism, the second driving mechanism and thebattery unit; the battery unit supplies power to the sensing control unit, the first driving mechanism and the second driving mechanism; the first driving mechanism can act on a piston of a card-typebottle arranged in the medicinal liquid cylinder assembly; and the second driving mechanism is connected with the medicinal liquid cylinder assembly so as to drive the medicinal liquid cylinder assembly to be moved frontwards and backwards. The electronic injection pen disclosed by the invention has the advantages that double driving mechanisms are adopted and separately operate, and mutual influence cannot be produced. The sensing control unit can control coordination of the various parts, and therefore, the electronic injection pen is intelligent and convenient.

Description

technical field [0001] The invention relates to the technical field of medical supplies, and belongs to syringes, in particular to an electronic injection pen. Background technique [0002] The current electronic injection pen generally has only one DC motor, which usually has the following problems: before the injection, the needle needs to be manually inserted into the skin, causing great psychological pressure to the patient; because the same motor is used for exhaust and injection, The exhaust speed is consistent with the injection speed, and it takes a few minutes to complete one exhaust; manual operation is required to install and pull out the needle, and it is easy to accidentally pierce the skin during the insertion and extraction process; when injecting, the injection speed is constant and cannot be injected according to the curve (such as slow injection first, then constant speed injection, etc.); the precision is not high, because the DC motor is used, the speed i...

AI Technical Summary

Problems solved by technology

[0002] The current electronic injection pen generally has only one DC motor, which usually has the following problems: before the injection, the needle needs to be manually inserted into the skin, causing great psychological pressure to the patient; because the same motor is used for exhaust and injection, The exhaust speed is consistent with the injection speed, and it takes a few minutes to complete one exhaust; manual operation is required to install and pull out the needle, and it is easy to accidentally pierce the skin during the insertion and extraction process; when injecting, the injection speed is constant and cannot be injected according to the curve (such as slow injection first, then constant speed injection, etc.); the precision is not high, because the DC motor is used, the speed is greatly disturbed by factors such as voltage

For injection pens with dual motors, there is usually a connection between the two driving motors, or the location layout is unreasonable, which is not conducive to popularization and use.

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