Simple medical injection device with replaceable medicine bottle

Abstract

The invention relates to a simple medical injection device with a replaceable medicine bottle. The device comprises an outer cylinder and a pen cap, wherein a detachable medicine bin is formed in one end of the outer cylinder, the replaceable standard clamping-type medicine bottle is arranged in the medicine bin, and a fixing sleeve is arranged at the end, close to the medicine bin, of the inside of the outer cylinder; the fixing sleeve is internally provided with a pushing rod base capable of moving axially, the pushing rod base is internally provided with a transmission ring which can be meshed with the end part of the transmission rod, and the transmission rod is sleeved with a ratchet ring which can slide axially; one end face of the ratchet ring is unidirectionally meshed with the interior of the outer cylinder, and the other end of the ratchet ring is axially provided with a first spring; one end of the pushing rod base is axially provided with a pushing rod base spring abutting against the outer cylinder; one end of a pushing rod penetrates through the pushing rod base and stretches into the standard clamping-type medicine bottle to be connected with a pushing block. The device is simple in structure and can be repeatedly used by adopting a new pushing rod retraction transmission mechanism.

Description

technical field [0001] The invention relates to the field of injection pens, in particular to a simple medical injection device with replaceable medicine bottles. Background technique [0002] Injection pen is a medical device widely used in clinical medicine for drug injection. [0003] At present, disposable sterile syringes are mainly used for drug injection on the market, but the injection process requires hospital visits and operation and injection by professionals. The convenience of operation is not suitable for the self-management of most chronic disease patients. At present, pure mechanical injection pens have the best safety and reliability in the structure of screw drive, clutch drive, and tactile feedback in the process of realizing precise drug distribution. [0004] At present, the injection pens are poor in versatility. The push rod of the current injection pens cannot be returned after the injection of the medicine, which makes the injection pens disposable....

AI Technical Summary

Problems solved by technology

[0004] At present, the injection pens are poor in versatility. The push rod of the current injection pens cannot be returned after the injection of the medicine, which makes the injection pens disposable. Now the injection pens are expensive. For patients who need injections for a long time, they are disposable. Injection pens are a small expens

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