| 摘要 |
An autoinjector comprises a body (10, 12), a syringe (13) or cartridge disposed within said body, and a plunger (60) moveable during operation between a first and a second position to effect an injection, the plunger including a transverse passage (66) containing a moveable magnetic element (68) of a magnetic pair, the body including another magnetic element (54) at a position such that, on said plunger reaching and/or nearing its second position, the magnetic attraction therebetween causes a sound-emitting impact, the plunger (60) including a magnetic keeper element (72) mounted adjacent said transverse passage and adapted to hold the movable magnetic element (68) against movement until attraction by the other magnetic pair element (54), wherein said keeper element (72) is disposed on said longitudinal axis. |
