The thrust rod comprises a proximal end, a distal end and a shaft extending to the distal end and the distal end. The farthest point of the thrust rod is a pressurized calcium device and a sealing belt placed on the next side of the pressurized calcium device.The detention period includes a portion of the main body formed around the axis of the thrust rod and a plurality of finger like parts extending from the main body to a distance from the axis of the thrust rod. Click hereAfter the injection is completed, the thrust rod continues to maintain a low thrust, thus providing the necessary additional blow when the extreme end of the thrust rod is pressed with a needle seat and the patient's pain is relieved. 1. Characteristic 1: a disposable syringe, consisting of a barrel (1),Includes a near end (5)One distal (6) and one hollow inland (7),This is a hollow interior (7) with a barrel shape (8) defined by the interior wall；A thrust rod (3), located in the barrel (7), can be moved in the barrel (1),The thrust rod (3) comprises a proximal end (11) far from the lower end (5) of the barrel, a distal end (10) located in the barrel (7) and a shaft (12) passing through the lower end (11) and the distal end (10) of the thrust rod. 1. The right end (10) equipped with the thrust rod has a wall (13)；1. The rubber piston (4) installed on the thrust rod is located on the non side (13) of the windshield, and is configured as a sealing form, which contacts with the inner wall (8) of the barrel. The windshield (13) is characterized by: one part is the main body (15) formed around the shaft (12) The thrust rod and a thrust and pressure part (16) are provided with a push and pressure rubber piston extending from the main body (15) to the direction away from the thrust rod shaft (12),There, the pushing and pushing parts are in such a way that when the rubber piston stops at the other end of the barrel, only the pushing and pressing parts are twisted, and it continues to push and press the
