Disclosed is an injection device comprising parts, the relative movement ofwhich causes the active substance tobe injected. For this purpose, a receptacle (103, 203), into and in which acarpule/syringe can be inserted and mounted, is retainedin a housing (101, 201), the receptacle (103, 203) can be moved by means of acarriage (108, 208), and a plunger (104, 204) thatapplies a force to the piston/s (111A, 111B； 211) of the carpule/syringe ismovably retained in the receptacle (103, 203). A tractionrope (114, 214) which is deflected by means of a roll (109, 209) mounted onthe carriage (108, 208) is provided for performing thepricking stroke, injection stroke, and retracting stroke. One end of thetraction rope (114, 214) is connected to the receptacle (103,204) while the other end thereof is connected to a tension spring (110, 210)that is retained on the housing (101, 201). Automaticallyand/or manually actuatable mechanisms between the housing (101, 201), thereceptacle (103, 203), the plunger (104, 204), and thecarriage (108, 208) control the reciprocal coupling thereof to the tractionrope (114, 214) and thus the sequence of the pricking stroke,injection stroke, and retracting stroke and are fitted with at least one meansthat allows the user to adjust the progress profile of atleast one of the strokes.
