Safe injector

Abstract

The invention discloses a safe injector which relates to the technical field of medical instruments, and comprises a needle cylinder (1) and a push rod (3), as well as an injection needle (10) and a connecting tube (2), wherein the injection needle (10) can be replaced as per use requirements. According to the invention, when the safe injector is in use, the traditional operating custom is barely changed, the use is convenient, and the effect is reliable; the injection needle (10) can retract and hide through an automatic retraction mechanism after finishing injecting to ensure that medical staff can be free from the unexpected harm of a contaminated needlepoint; after the injection is completed, the push rod (3) cannot be pulled back as being clamped by clamping rings (1e), so that the push rod cannot be reused, the real disposable injector is realized, and further the cross transmission of blood-borne diseases is avoided; support sheets (1c) are adopted to support the connecting tube (2), and a conical head pulling back rod (3d) is sleeved with a compression spring (7) in a flat pressing annular manner, so that the structural design is more reasonable, the safe injector is more suitable for the automatic assembly production of a production line, the quality is reliable, the qualification rate is high, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, and relates to a safety syringe, in particular to a disposable safety syringe or a disposable self-destruction safety syringe. Background technique [0002] At present, the promotion of the use of disposable syringes has played a corresponding positive role in preventing cross-infection. It has been almost 30 years in the past, and I will seriously summarize the problems of these disposable syringes: the existing technology is disposable. Bacterial syringes—including various forms of disposable sterile syringes, including push rod pull-back break-off type, steel sheet self-locking self-destruct type, needle manual pull-back type, needle spring tension automatic retraction type, and sliding sleeve type, etc. ——Due to the imperfect structure design of the product and the lack of some necessary and reliable functions, the product cannot fully meet the needs of safe use. For example: 1. The ...

AI Technical Summary

Problems solved by technology

[0002] At present, the promotion of the use of disposable syringes has played a corresponding positive role in preventing cross-infection. It has been almost 30 years in the past, and I will seriously summarize the problems of these disposable syringes: the existing technology is disposable. Bacterial syringes—including various forms of disposable sterile syringes, including push rod pull-back break-off type, steel sheet self-locking self-destruct type, needle manual pull-back type, needle spring tension automatic retraction type, and sliding sleeve type, etc. ——Due to the imperfect design of the product structure and the lack of some necessary and reliable functions, the product cannot fully meet the needs of safe use

For example: 1. The disposable aseptic syringe of the prior art, because the product remains basically the same after use, when the injection needle is exposed and needs to be put back on the injection needle protective cover, this process is very easy for the medical staff to suffer from the exposure of the exposed needle tip. Accidental injuries, especially infectious diseases such as hepatitis B and AIDS, will have a great impact on the health of medical staff; 2. Although this product was named "disposable sterile syringe" when the In general, the purpose of only one use cannot be achieved, and most of them can be reused. That is to say, the "one-time use" of these products is only strictly required from the management. The repeated use and recycling of disposable sterile syringes 3. When dry powder injections are used to prepare liquid injections, after the solution is injected into the powder drug container, the injection needle will puncture through the rubber stopper. Strictly speaking, the injection needle used to puncture the rubber stopper of the medicine bottle when preparing the liquid medicine must not be used to inject the human body again, and some countries have formulated "Mandatory requirements or regulations regarding the use of injection needles used to puncture the rubber stoppers of pharmaceutical vials in the preparation of liquid medicines and can no longer be used for injection into the human body"

And the single-use aseptic syringe of prior art comprises self-locking self-destruction type, push rod pulls back and breaks type manually, though can change the needle head, but the needle head can not be concealed after using; Add a cannula, and slide the cannula forward after the injection is used. Although the injection needle is concealed, it is a great waste of material resources and human resources to double the consumption of materials and increase the operation action), and the needle automatically returns by spring tension. There are various types of self-retracting needle safety syringes, such as the retractable type and the negative pressure retractable type of the needle. When these types of syringes are processed after use, the metal parts (injection needles, compression springs and steel sheets, etc.) It is difficult to classify plastic parts and plastic parts, so that most of these products have to be burned in incinerators after use, and the materials that can be recycled cannot be recycled. Moreover, a large amount of waste gas generated after a large amount of plastic materials are incinerated is exacerbated. In order to avoid pollution to the atmospheric environment, social domestic waste is still being sorted, and reusing available waste can not only reduce the total amount of waste by 30-40%, but also save a lot of material resources for the society

my country is a big country that uses disposable sterile syringes. Its consumption is calculated at least one billion per year, and it is more than 20 billion for more than 20 years. Calculated according to the average weight of each 5 grams, it is 5,000 tons per year. More than 100,000 tons in more than ten years, how much is it in the world? It must have greatly exceeded the above-mentioned data, and these shortcomings are due to the structures of various types of disposable syringes mentioned above Insufficient safety and other defects or shortcomings or insufficient structure caused by

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