Pressure control injector

The utility model discloses a pressure control injector, and belongs to the field of medical instruments. Comprising a needle cylinder and a first column bolt, the first column is connected with a piston and the needle cylinder to form a cavity used for being filled with injection medicine, a closed cavity is formed between the first column and a second column, a pressure sealing ring is pushed when pressure in the cavity is increased, pressure is released through an exhaust hole, and medical staff can be helped to control the injection propelling speed and the injection pressure; and too high injection speed and too large injection pressure are prevented. 本实用新型公开了一种控压注射器，属医疗器械领域。包括针筒、第一柱栓，第一柱连接活塞与针筒形成空腔用以填充注射药剂，第一柱与第二住之间形成封闭空腔，空腔内压力增大时推动压力密封圈，通过排气孔释放压力，可帮助医护人员控制注射推进速度和注射压力，防止注射速度过快以及注射压力过大。