Injection device with needle detection feature

Abstract

The present invention relates to an injection device comprising: a housing; a needle connection (55) for attaching a needle (61) to a medicament cartridge (7) received in the housing (2); an injection drive mechanism (9); an electronic control system for controlling the injection drive mechanism (9); and a needle sensing feature for detecting attachment of the needle (61) to the medicament cartridge (7). The needle sensing feature comprises: a slider (13) comprising a magnetic portion; and an electromagnetic sensor (203) arranged within the housing (2) such that when the slider (13) is in its retracted position, the magnetic portion is movable between a position away from the electromagnetic sensor (203) and a position adjacent to the electromagnetic sensor (203), where the electromagnetic sensor (203) generates a signal indicating that the pointer (61) is attached to the medicament cartridge (7).

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