Patent ID: 8333730

Claim:
In combination with a one-way disposable injector with a housing ( 200 ) in which or on which are arranged, in each case at least in some areas, at least one mechanical spring energy reservoir ( 50 ), at least one cylinder/piston unit ( 100 ) that can be filled at least temporarily with active substance, at least one piston-actuating ram ( 60 ) and at least one trigger unit ( 80 ), the piston-actuating ram ( 60 ) is positioned between the spring energy reservoir ( 50 ) and the piston ( 111 ) of the cylinder/piston unit ( 100 ), the spring energy reservoir comprises at least one pretensioned spring element ( 50 ), and the spring-loaded piston-actuating ram ( 60 ) is supported on the housing ( 200 ) via support rods ( 240 ) or tension hooks ( 250 ), and wherein the contact zone situated between an individual support rod ( 240 ) or tension hook ( 250 ) and the piston-actuating ram ( 60 ) represents a wedge gear pairing that forces the respective support rod ( 240 ) or tension hook ( 250 ) outwards, the improvement which comprises: the housing ( 200 ) is made from a thin-walled sheet-metal part ( 201 , 202 ), the sheet-metal part ( 201 , 202 ) has at least two branches ( 220 , 250 ), the branches ( 220 ) each have, at the free ends thereof, an angled retaining element ( 221 ) or a recess as a means of receiving the cylinder ( 101 ) of the cylinder/piston unit ( 100 ), the sheet-metal part ( 201 , 202 ) has at least two pressure rods ( 240 ) or at least two tension hooks ( 250 ), the free ends of which are each bent at an angle to form a supporting portion ( 241 , 251 ) for the piston-actuating ram ( 60 ), and the at least one trigger unit ( 80 ) comprises at least one trigger element ( 82 ) which is slidably arranged on the housing ( 200 ), wherein the at least one trigger element ( 82 ) has windows ( 83 ) or longitudinal grooves ( 88 ) which accommodate the supporting portions ( 241 ) of the support rods ( 240 ) or the support portions ( 251 ) of the tension hooks ( 250 ) after the release of the one-way disposable injector.