1. A needleless disposable injector with a housing (10), which includes at least one compression rod (21), with a cylinder-piston block (100), with a plunger (60), a control piston, and a trigger device ( 80) and with a prestressed, locked compression rod (21), driven by a trigger device (80) with a spring energy accumulator (50), the compression rod (21) using a spring accumulator (50) ) and the plunger (60) that controls the piston can move with sliding along at least one trigger element (82) of the trigger device (80) and be forced out and, moreover, the cylinder-piston block (100) can be actuated by means of a spring energy accumulator (50),! characterized in that the conjugation of the inner wall (59) of the trigger element (82) facing each other and the abutment surface (24) of the compression rod (21) has at least a higher slip friction coefficient than the conjugation of the inverted to each other of the mating surface (75) of the plunger (60) that controls the piston, and the supporting surface (23) of the compression rod (21). ! 2. A disposable injector according to claim 1, characterized in that the trigger element (82) in the form of a sleeve at least partially covers the housing (10). ! 3. The disposable injector according to claim 1, characterized in that it includes two rods (21) working in compression. ! 4. A disposable injector according to claim 1, characterized in that the arithmetic mean deviation of the surface profile (24) of the abutment and / or the inner wall (59), at least in the contact area of these surfaces (24, 59), is greater than or equal to ten microns �1. Безыгольный одноразовый инъектор с корпусом (10), который включает, по меньшей мере, один стержень (21), работающий на сжатие, с блоком (100) цилиндр-поршень, с плунжером (60), управляющим поршнем, со спусковым устройством (80) и с предварительно напряженным, заблокированным стержнем (21), работающим на сжатие, приводимым в действие с помощью спускового устройства (80) пружинным ак
