Dual-function spring

Abstract

An injection device for dispensing a product, the injection device including a moveable element which is moved for a dispensing operation, a spring, a product container holder and a product container, wherein the spring pushes against the moveable element to move the moveable element to an initial position after the dispensing operation has ended and against the product container to seat the product container in the product container holder.

1 . An injection device for dispensing a product, the injection device comprising a moveable element which is moved for a dispensing operation, a spring, a product container holder and a product container, wherein the spring pushes against the moveable element to move the moveable element to an initial position after the dispensing operation has ended and against the product container to seat the product container in the product container holder. 
     
     
         2 . The injection device as claimed in  claim 1 , wherein the spring is disposed between the moveable element and the product container. 
     
     
         3 . The injection device as claimed in  claim 2 , wherein the spring is one of a separate part or a part formed by the moveable element. 
     
     
         4 . The injection device as claimed in  claim 1 , wherein the spring acts on the product container directly or via a retainer. 
     
     
         5 . The injection device as claimed in  claim 4 , wherein at least one of the spring and the retainer comprises a stop which prevents the spring from fully relaxing when no product container is inserted. 
     
     
         6 . The injection device as claimed in  claim 1 , wherein the moveable element comprises part of a coupling and is moved out of the coupling for a dispensing operation. 
     
     
         7 . The injection device as claimed in  claim 1 , wherein the moveable element is able to move axially relative but not rotate. 
     
     
         8 . The injection device as claimed in  claim 1 , further comprising an output element which acts on the product to be dispensed to dispense the product via a plunger which is moveably accommodated in the product container, and the moveable element is coupled with the output element so that it blocks a dispensing movement of the output element when the injection device is in a non-secured state. 
     
     
         9 . The injection device as claimed in  claim 8 , wherein the dispensing movement of the output element is a rotating movement. 
     
     
         10 . The injection device as claimed in  claim 8 , further comprising an axially displaceable operating element which can be operated by a user of the injection device, wherein, when the operating element is operated, the moveable element is moved axially so that the output element is released for a movement in or opposite a dispensing direction. 
     
     
         11 . The injection device as claimed in  claim 8 , further comprising a locating element which can be moved in an engaged connection to the output element and between a first position and a second position, and the output element is uncoupled from the moveable element in the first position so that the output element can be moved in or opposite a dispensing direction. 
     
     
         12 . The injection device as claimed in  claim 11 , wherein the locating element is coupled with a fixing device so that it is moved axially when the product container is being secured or released. 
     
     
         13 . The injection device as claimed in  claim 10 , wherein the operating element can be re-set by the spring.