Patent ID: 7182749

Claim:
An injection device for injecting a fluid product from a reservoir in an injection direction, comprising: a) a casing having at least a first retractable casing portion and a second fixed casing portion; b) a mounting for receiving said reservoir, wherein the second fixed casing portion is fixedly attached to the mounting and extends a first, fixed length along an axial direction of the reservoir, wherein the first fixed length is less than a total length of the reservoir in the axial direction, and the first retractable casing portion is slidably attached to the second fixed casing portion, wherein the reservoir is not accessible for replacement when the first retractable casing portion is extended in the injection direction and the reservoir becomes accessible when the first retractable casing portion is retracted in a direction opposite to the injection direction by telescoping the first retractable casing portion into the second fixed casing portion; and c) an activating element for triggering fluid product administering.