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Medicine injection device capable of achieving multiple times of injection

A technology of multiple injections and injection devices, applied in the field of syringes, can solve the problems of unstable pressure and the speed at which the cartridge piston is pushed.

Active Publication Date: 2021-09-14
宁波睿爱产品设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned related technologies, the inventor believes that the above-mentioned drug injection device for multiple injections requires continuous force to push the piston of the cartridge to move, and the pressure applied to the piston of the cartridge is unstable, resulting in There is a problem with the speed at which the cartridge piston is pushed

Method used

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  • Medicine injection device capable of achieving multiple times of injection
  • Medicine injection device capable of achieving multiple times of injection
  • Medicine injection device capable of achieving multiple times of injection

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Embodiment Construction

[0063] The following is attached Figure 1-26 The application is described in further detail.

[0064] In this application, when the term "front end part / front end" is used, it refers to the part / end of the drug injection device or its components for multiple injections that is close to the injection area of ​​the human body during the injection process; correspondingly, when the term "rear end" is used When referring to "end part / rear end", this refers to the part / end of a multi-injection drug injection device or its components that is away from the injection area of ​​the human body during the injection process. And the state of the drug injection device for multiple injections when not in use is defined as the initial state of the drug injection device.

[0065] figure 1 A schematic structural view of the cartridge 9 is shown. refer to figure 1 , the cartridge bottle 9 is a conventional medical container for storing medicinal liquid, including a glass casing 91 , a pist...

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Abstract

The invention relates to a medicine injection device capable of achieving multiple times of injection. The medicine injection device comprises a shell, a plunger rod, a driving spring and a locking sleeve, wherein the plunger rod is axially and slidably installed on the shell, the driving spring is installed in the shell, and the locking sleeve is circumferentially and rotatably installed in the shell and sleeves the outer side of the plunger rod; a plunger convex part is arranged on the outer side of the plunger rod; the driving spring drives the plunger rod to always have a trend of moving in the injection direction; the locking sleeve is provided with a locking step structure which is used for allowing the plunger convex part to abut against so as to restrain the plunger rod from moving in the injection direction; and after the locking sleeve rotates by a specified angle in the unlocking direction, the plunger convex part is separated from the locking step structure, an injection stroke is formed between the plunger convex part and the next step surface of the locking step structure, and under the action of the driving spring, the plunger rod moves in the injection direction until the plunger convex part abuts against the next step surface of the locking step structure. The medicine injection device has the advantage that the pressure fluctuation applied to a piston of a clamping type bottle is small during injection.

Description

technical field [0001] The present application relates to the field of syringes, in particular to a drug injection device for multiple injections. Background technique [0002] The drug injection device for multiple injections is a drug injection device that can divide the drug solution in the drug tube into several injections into the patient's body. Since the drug injection device for multiple injections can be used multiple times, it can better meet the needs of patients. The existing drug injection device for multiple injections transmits the thrust applied by the user on the tail cap to the piston of the cartridge bottle through the built-in linkage structure, so as to realize the hydraulic pressure of the drug in the cartridge bottle. out. [0003] In view of the above-mentioned related technologies, the inventor believes that the above-mentioned drug injection device for multiple injections requires continuous force to push the piston of the cartridge to move, and t...

Claims

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Application Information

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IPC IPC(8): A61M5/24A61M5/20A61M5/315A61M5/48
CPCA61M5/24A61M5/20A61M5/31501A61M5/31511A61M5/31551A61M5/31573A61M5/3158A61M5/31593A61M5/484A61M2005/2026
Inventor 侯士双胡高扬陈常娇
Owner 宁波睿爱产品设计有限公司
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