| 摘要 |
The apparatus comprises a casing 1, a drive shaft 10 which, in use, engages a medicine containing cartridge, an automatic driver 7, a user actuable trigger 4 for causing the automatic driver 7 to move the drive shaft 10 through the casing, and a user actuable brake 24 for allowing a user to control a rate of delivery of medicine. The apparatus has a cam follower 23 located on the trigger which engages with a helical track on drum 12. When dose setting the apparatus, rotation of the drum relative to the casing causes ramps (18, 20) located on these parts to co-operate, this moves the drum longitudinally and brings the cam follower into engagement with the track. The apparatus also comprises an opening 29 which allows the drive shaft 10 to be manipulated to ensure contact with the cartridge. |
