Safety syringe and safety mechanism therefor

Abstract

The invention discloses a safety syringe and a safety mechanism therefor. A safety syringe (1) comprises a barrel (2) having a proximal end (3), a distal end (4) and a chamber (5) between the proximal and distal ends defining a longitudinal axis, a needle holder (6 ) extends from the distal end to the distal side; the plunger (7) has a distal portion inserted into the syringe from the proximal end of the syringe and a proximal portion located outside the syringe; the needle (8) has a needle holder a proximal portion inserted into the needle channel of the needle holder and a distal portion located outside the needle holder, the needle being hollow and in fluid communication with the chamber of the barrel; and a safety mechanism (9), at least partially surrounding The needle holding part is installed, in the non-actuated position of the safety mechanism, the distal part of the needle is not covered by the safety mechanism, and in the activated position, at least the distal end of the needle is covered by the safety mechanism to prevent accidental contact with the distal end of the needle touch. According to the present invention, when assembling the syringe, the safety mechanism can be installed first, and then the needle can be installed, so that the needle only needs to be calibrated once, and the needle will not be interfered before the safety mechanism is actuated.

Description

technical field [0001] The present invention relates to a safety syringe and a safety mechanism for the safety syringe. Background technique [0002] Accidental sticking with a used syringe can transmit disease. Accordingly, the prior art teaches syringes with actuatable safety shields that can be positioned to guard against accidental contact with the needle tip after use of the syringe. The prior art safety shield is provided with a stopper for protecting the needle tip, and the stopper has a needle channel, and the needle needs to pass through the needle passage of the stopper to install the safety shield with the stopper during the assembly of the syringe. Needing to calibrate the pins again due to unavoidable touching of the pins during the installation process is time consuming and prone to errors. Contents of the invention [0003] The present invention aims to solve the above-mentioned problems existing in the prior art. [0004] In one aspect, the present inven...

AI Technical Summary

Problems solved by technology

The prior art safety shield is provided with a stopper for protecting the needle tip, and the stopper has a needle channel, and the needle needs to pass through the needle passage of the stopper to install the safety shield with the stopper during the assembly of the syringe. Re-calibration of the needle is required due to inevitable contact with the needle during installation, which is time-consuming and error-prone

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