Automatic injection device

Abstract

The invention relates to an automatic injection device. The automatic injection device comprises a pipe body, a fixed sleeve, an injection assembly, a sound production element, a movable sleeve, a first elastic element and a second elastic element, wherein the sound production element comprises an annular body and sound production blocks; the annular body is coaxially and movably arranged in the fixed sleeve; the sound production blocks are arranged on a peripheral wall of the annular body; the sound production blocks penetrate out of the fixed sleeve in a radial direction and the sound production blocks and the fixed sleeve are relatively positioned through corresponding positioning structures; sliding grooves for the sound production blocks to axially move downwards after freeing from the corresponding positioning structures are formed in the fixed sleeve; each sound production block can produce a sound when bumping against an inner wall of one sliding groove; the movable sleeve sleeves the fixed sleeve; the lower end of the movable sleeve can extend out of the pipe body; the movable sleeve is provided push parts capable of pushing the sound production blocks to move to free fromthe corresponding positioning structures when moving upwards; the first elastic element acts on the sound production element, so that the sound production element keeps moving downwards all the time;and the second elastic element acts on the movable sleeve, so that the movable sleeve keeps moving downwards all the time. The sound production element prompts a user to start the injection, so thatthe safety is high.

Description

technical field [0001] The invention belongs to the technical field of medical appliances, and in particular relates to an automatic injection device. Background technique [0002] The most common way of administering the drug is by injection, eg intravenously, subcutaneously or intramuscularly, a syringe containing the drug is used for the injection, which is usually administered by trained healthcare personnel. In some cases, where regular injections of medication are required, it may be desirable for a patient or other individual to use a syringe to self-inject or give injections to other individuals, and devices for automatic injections have been developed to allow patients to self-inject. [0003] However, since patients are usually neither nurses nor educated in medical devices, such devices for automatic injection must prove to be simple and safe to use. Therefore, it is important for the user to be informed that the product has been injected, has been substantially ...

AI Technical Summary

Problems solved by technology

[0005] This device can only be used for training. If it is used as a real syringe, there will be many problems: 1. The first sounding part is connected to the piston rod. If the sound can be heard, the first sounding part needs to be fast enough. impact on the bottom wall of the bar-shaped groove, because the injection simulation component as a whole moves synchronously with the first sounding part in the initial state, the injection simulation component will also quickly move downward and hit the piston in the needle tube, and the moving speed is too fast It will cause the needle tube (not shown in the figure, the tube body of the injection simulation assembly can be movably inserted in the needle tube) to break; if in order to prevent the needle tube from breaking, the running speed of the injection simulation assembly cannot be too fast, but the impact of the first sounding part on the It is very likely that there will be no sound on the strip groove. In short, the sound of the above-mentioned patent is related to the running speed of the injection simulation component. It is difficult to ensure the sound without damaging the needle tube; 2. In order to prevent the needle from being exposed, it is necessary to set More parts to prevent the movable sleeve from moving up, resulting in more involved parts and high failure rate

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