NEEDLE BASE RETRACTABLE-TYPE SAFE SELF-LOCKING-TYPE SELF-DESTRUCTING SYRINGE

摘要

A retractable-type safe self-locking-type self-destructing syringe, which comprises a syringe barrel body (6). A plunger (7) is arranged in the syringe barrel body (6). A needle base is arranged in a barrel neck at an end part of the syringe barrel body (6). A sealing ring (3) is sleeved on the outer wall of the needle base. A head part for needle replacement is formed by the upper part of the needle base. A flexible support engaging piece (4) is arranged within a cavity at the lower part of the needle base. A locking-clutching mechanism matching the end part of the plunger (7) is arranged within the flexible support engaging piece (4).

主权项

1. A needle base retractable type safe self-locking type self-destruction syringe, comprising: a syringe tube body which is provided therein with a core bar over which a piston fits adjacent to the end of the core bar, a needle base provided in the tube journal at the end of the syringe tube body, a sealing ring fitting over the outer wall of the needle base, wherein an interchangeable needle head is formed in the upper portion of the needle base; wherein an elastic supporting clamping part is provided in the lower cavity of the needle base; wherein the elastic supporting clamping part is provided with a locking engagement structure to cooperate with the end of the core bar, wherein the locking engagement structure has a nature of elasticity, wherein the elastic supporting clamping part is provided on the outer portion with an elastic supporting position-limiting structure to cooperate with the inner wall of the inner cavity of the syringe tube body, and the end of the core bar forming an engagement part to engage with the locking engagement structure.