Syringe
AssigneeGuangdong Haiou Medical Apparatus Co., Ltd.
InventorsZhuoxuan ZHANG, Jiangsheng ZHANG
Life of this patent
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Abstract
A syringe includes a syringe barrel defining a needle receiving chamber and a plunger receiving chamber, a pull-back member received in the needle receiving chamber, and a plunger received in the plunger receiving chamber and comprising an end defining a first receiving chamber and a second receiving chamber. The pull-back member is configured to mount a needle thereto and comprising an engagement portion. The first receiving chamber has a sectional area that is less than a sectional area of the second receiving chamber, and the first receiving chamber has a closed curved surface. The engagement portion is configured to pass through the first receiving chamber and snap-fit into the second receiving chamber when the plunger is inserted into the pull-back member.
Claims10
A syringe comprising:
- a syringe barrel defining a needle receiving chamber (11) and a plunger receiving chamber (12);
- a pull-back member (3) received in the needle receiving chamber (11), the pull-back member (3) configured to mount a needle (5) thereto and comprising an engagement portion (31);
- and
- a plunger (2) received in the plunger receiving chamber (12) and comprising an end defining a first receiving chamber (21) and a second receiving chamber (22), the first receiving chamber (21) having a sectional area that is less than a sectional area of the second receiving chamber (22), and the first receiving chamber (21) comprising a closed curved surface;
- wherein the engagement portion (31) is configured to pass through the first receiving chamber (21) and snap-fit into the second receiving chamber (22) when the plunger (2) is inserted into the pull-back member (3).
Dependencies are inferred from the claim text.