Patent ID: 11872377
Assignee: GUANGDONG HAIOU MEDICAL APPARATUS CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. A syringe, comprising:
a barrel comprising a needle accommodating-cavity and a plunger accommodating-cavity, the cross-sectional area of the needle accommodating-cavity being less than that of the plunger accommodating-cavity;
a pull-back element accommodated in the needle accommodating-cavity, wherein a needle is mounted on the pull-back element, and a cavity is provided at an end of the pull-back element proximate to the plunger accommodating-cavity;
a plunger disposed in the plunger accommodating-cavity and movable between a pushed-in position and a pulled-out position, wherein a head portion of the plunger enters the cavity of the pull-back element and is engaged therein when in the pushed-in position;
a biasing force structure provided in the cavity of the pull-back element and/or the head portion of the plunger, wherein the head portion of applies a biasing force on the pull-back element by means of the biasing force structure, and when the head portion of the plunger moves to the pulled-out position, the biasing force structure causes the pull-back element and the needle to tilt with respect to the axis of the barrel in the plunger accommodating-cavity by means of the biasing force,
a needle-holder arranged on an outer side of the first end of the barrel, and the needle-holder is in a tight-fitting connection with the pull-back element;
a sealing ring is sleeved and fixed on the pull-back element where the needle-holder and the pull-back element are tight-fitting connected.