Abstract: A safety syringe cylinder has a structure for attaching a syringe needle precisely. The syringe needle can be retracted into the syringe cylinder for bending. A hook seat is formed at a lower end of the needle. An annular hook groove is formed at a top end of the push rod cap. The hook seat is engaged with the annular hook groove so as to control the displacement and bending process of the syringe needle. Thereby, the processing of undesired syringe needle is safe, reliable and convenient.

Abstract: A safety syringe cylinder has a structure for attaching a syringe needle precisely. The syringe needle can be retracted into the syringe cylinder for bending. A hook seat is formed at a lower end of the needle. An annular hook groove is formed at a top end of the push rod cap. The hook seat is engaged with the annular hook groove so as to control the displacement and bending process of the syringe needle. Thereby, the processing of undesired syringe needle is safe, reliable and convenient.

Abstract: A retractable safety syringe cylinder has a structure which precisely hooks the syringe needle for retracting the syringe in the syringe cylinder for bending A hole seat at a lower end of the syringe needle is matched to a hook body at a top surface of a rod cap of a push rod. After pushing injection liquid, the two are engaged so as to control the displacement of the syringe needle. Thus, the waste from the syringe is controllable and the operation is convenient.