초록 ▼

The present invention relates to a drug delivery device wherein a dose to be apportioned from a cartridge is set by changing the relative position of co-operating dose setting elements (3, 5) and is injected by pressing a button (5) until this button abuts a stop (6). By operation of count up (7) or

The present invention relates to a drug delivery device wherein a dose to be apportioned from a cartridge is set by changing the relative position of co-operating dose setting elements (3, 5) and is injected by pressing a button (5) until this button abuts a stop (6). By operation of count up (7) or count down (8) buttons the dose is set and read into an electronic circuit (9) comprising a microprocessor and the dose setting movement of the dose setting elements relative to each other is performed by a motor (11) controlled by the circuit in accordance with the read in dose. The set dose is shown on a display (10). The motor (11) is further controlled to perform certain movements of the piston rod (3) so as retraction of this rod when a cartridge (1) is going to be changed an advancing of the piston rod to abutment with the piston (2) after the cartridge has been changed and further to advance this piston to expel air from the cartridge.

대표청구항 ▼

[ We claim:] [1.] A drug delivery device for dispensing set doses from a cartridge, comprising:cooperating dose-setting elements, the relative position of which can be changed to set a dose;a delivery button which is moved away from an original position relative to the device in response to setting

[ We claim:] [1.] A drug delivery device for dispensing set doses from a cartridge, comprising:cooperating dose-setting elements, the relative position of which can be changed to set a dose;a delivery button which is moved away from an original position relative to the device in response to setting of a dose and which is exposed such that the user of the device may manually press it back toward said original position, and wherein pressing the delivery button toward said original position causes the set dose to be injected;an electronic circuit into which a value representing a set dose may be read and stored; andan electromechanical device which is controlled by the electronic circuit to move the dose setting elements relative to one another in accordance with the stored dose value, thereby to set the desired dose, wherein the set dose may thereafter be administered manually by pressing said delivery button.