The present invention relates to a kind of syringes. Particularly, having syringe flow passage compared to traditional syringe includes injection needle, it is shared that a part of flow passage of syringe, which does not include syringe, or it acts independently without seeking company in inhalation flow path and is formed according to the present invention from the flow path of syringe, therefore, it can more energetically medical fluid suck. The syringe includes syringe needle (10) and cylinder (20) and has flow passage, includes from syringe cylinder (20) to syringe needle (10). A kind of opening and closing device (400) is for selectively sealing injection device flow passage Through-hole is for connecting inside, with any one external syringe needle (10), connector (500) connecting needle (10) and cylinder (20), and cylinder (20) The through hole being opened and closed with a Dan Xiang Valve means (300) control. It is additionally formed in a kind of suction flow passage and extends to hollow cap (100) with cutting edge to cylinder (20). Therefore, individual suction stream path, does not pass through that syringe needle is formed in traditional syringe and medical fluid more initiative can suck in this way. Therefore, the convenience of user and product quotient pin property can maximize.The 2017 of copyright KIPO submissions
