This creation provides a kind of collection needle device of pen-type injector (hereinafter referred to as " syringe "),It include: shell,It is hollow to accommodate all elements,There are opposite top and bottom,One end of syringe insertion is upper end； Needle unit is pressed from both sides,The close upper part in the center of position what shell,On have the first helical member,Top is equipped with posting port,It is inserted into for syringe,To clamp the syringe needle of insertion； Unlocking unit,Including the first helical member on folder needle unit； Second helical member on shell,It engages each other,It is inserted by syringe,First helical member rotates plural number circle around the second helical member； Revolving part,Below the what folder needle unit of position,To reduce the folder needle unit rotational resistance； And spring element,Below the what revolving part of position,Its all motor element in top of simultaneously involution are supported,Syringe needle is set to be detached from syringe head end screw thread with rotation； And bottom cover,The lower end in position what shell center,It is interior hollow,The top of bottom cover is connect with spring element,In compression elasticity part what shell,Bottom is equipped with quick coupling with connecting adapter,Bottom cover and position what spring element thereon,The center of revolving part and folder needle unit is common,A space is provided to be discharged to the syringe needle unloaded,User's injection finishes Hou,Only it is inserted among syringe what collection needle device by one hand,Complete syringe needle can be used on removal syringe,Trocar head is avoided back to unload needle and stabbed,MeanwhileThe collection needle device can allow any container,It is not required to separately purchase exclusive container to carry out syringe needle recycling.本創作提供一種筆型注射器（以下簡稱“注射器”）用的集針裝置，包括：殼體，中空以容置所有元件，有相對的上端與下端，注射器插入的一端為上端；夾針單元，位於殼體的中央靠近上端部分，上有第一螺旋件，頂端設有置入口，可供注射器插入，用以夾緊插入的注射器針頭；解鎖
