A needle protection device and a safety syringe

Abstract

The invention relates to the technical field of medical syringes, and specifically discloses a needle protection device and a safety syringe, wherein the needle protection device at least includes a plug body, a sliding sleeve and a non-return member, and the sliding sleeve is sleeved on the plug body and axially aligned with the plug body. In the flexible connection, the sliding sleeve is configured to have an initial state and an extended state in the axial direction relative to the plug body, and the non-return member is configured to: in the initial state of the sliding sleeve, the disc-shaped body is located at the end of the plug body Between the end of the sliding sleeve, the rod-shaped body is located in the accommodation space; in the extended state of the sliding sleeve, the rod-shaped body is out of the accommodation space, and the non-return member is supported on the end of the sliding sleeve and the end of the plug body. The needle protection device and safety syringe with the above structure have the technical advantages of simple structure, low cost, convenient assembly, convenient operation, safety and reliability.

Description

technical field [0001] The invention relates to the technical field of medical syringes, in particular to a needle protection device and a safety syringe. Background technique [0002] Disposable safety syringes are commonly used medical devices. In order to prevent accidental injury to users by syringe needles after use and to prevent secondary use of syringes, this type of syringe is usually equipped with a needle protection device, which covers the needle after use to prevent accidental injury to users. The needle protection device also has a non-return structure to prevent the needle protection device from returning to the original position after covering the needle, thereby solving the problem of preventing secondary use. [0003] In the prior art, one type is a retractable needle safety syringe, which has a relatively complicated structure and high cost. [0004] In addition, there is also a sliding sleeve type safety syringe in the prior art, for example, a Chinese u...

AI Technical Summary

Problems solved by technology

The disadvantages of this slip-on safety syringe are:

[0005] (1) The operation is complicated. After pushing the sliding sleeve, it is necessary to rotate the sliding sleeve, and a large force needs to be applied when rotating the sliding sleeve to realize the locking function of the locking mechanism;

[0006] (2) The sliding sleeve is unidirectional when it is rotated. If it is rotated in the opposite direction, the locking mechanism cannot be triggered. In actual operation, the user does not always remember the direction of rotation. Based on the fact that the user needs to apply a large force to rotate the lock Recognize that when the user misuses the sliding sleeve in the opposite direction, it may directly destroy the needle protection device

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