The invention of the first housing which is formed a first receiving portion of the through hole side to the other at one side, wherein the first extending and receiving portions folded by combining a second housing which is formed a second receiving portion of the through hole from one side toward the other hinge such configurations, this first enclosure or a falling drug of the second housing has a chamber which is accommodated in the drive unit and a portion of the first accommodating when folded and a second receiving portion inward to control the amount of dropping medication by pressing the aperture of the tube in the state achieved in including a sensing for sensing the speed of a lock means to enable to one another with side one another in close contact state of the side surface and the second housing of the first housing when folded and, one side upper end of the first enclosure and the first connection portion connected with the first receiving portion by cutting the second connecting portion and the second in which the second connection with the receiving part in a position corresponding to the first connection by cutting the other side of the top of the second enclosure first receiving portion or second by yirueojim including a tube of the chamber to intergranular bone fitted in the receiving portion, in combination with the chamber of the tube, without complex wiring and connected easily auto clamps to control the amount of drug to be injected jimyeonseo to relate.