Medicament delivery device
The present invention relates to a medicament delivery device ( 10 ) comprising a housing ( 12, 14 ); a medicament container ( 22 ) arranged inside the housing; a medicament delivery drive unit comprising a plunger rod ( 28 ) acting on said medicament container ( 22 ) and a power force ( 26 ) capable of driving said plunger rod ( 28 ) for delivering a dose of medicament. The invention is characterised in a delivery controller ( 30 ) comprising a manually operable release mechanism ( 30, 36 ) for releasing said plunger rod ( 28 ) and said power source ( 26 ) for delivering a dose of medicament and a manually operable control speed mechanism ( 30, 38 ) capable of controlling the speed of the released plunger rod and thereby the medicament delivery speed.
1. A medicament delivery device, comprising:
a generally elongated tubular housing having a front part and a rear part;
a medicament container disposed within the front part, wherein the container has a front opening for a delivery member for delivering medicament therethrough;
a medicament delivery drive unit, comprising a power source and a plunger rod, and arranged to be moved between a cocked position and a released position within the medicament container with a determined speed; and
a manually operable delivery controller arranged to be rotated between a locked position, in which a release mechanism of the manually operable delivery controller holds the medicament delivery drive unit in the cocked position, and a releasing position, in which the release mechanism releases the medicament delivery drive unit;
wherein the manually operable delivery controller is further arranged to rotate between the releasing position and a controlling position, in which a control speed mechanism of the manually operable delivery controller interacts with the medicament delivery drive unit for controlling the speed of the medicament delivery drive unit and thereby the medicament delivery speed; the manually operable delivery controller comprises a scroll wheel segment protruding through an opening on a side of the rear part; the scroll wheel segment is turnable around an axis; the release mechanism includes a ledge of the scroll wheel segment interacting with a front end of the plunger rod, such that when the front end of the plunger rod rests onto the ledge, the medicament delivery drive unit is held in the cocked position, and when the scroll wheel segment is moved from the locked position to the releasing position, the ledge is disengaged from the front end of the plunger rod and the medicament delivery drive unit is moved from the cocked position to the released position.
2. The delivery device of claim 1 , wherein the control speed mechanism includes a contact surface of the scroll wheel segment interacting with a side surface of the plunger rod, such that when the scroll wheel segment is moved from the releasing position to the control position, the contact surface makes contact with the side surface of the plunger rod for controlling the speed of the medicament delivery drive unit and thereby the medicament delivery speed.
3. The delivery device of claim 2 , wherein the contact surface is arranged with friction enhancing members.
4. The delivery device of claim 3 , wherein the friction enhancing members include at least one of protrusions, grooves, and ribs.
5. The delivery device of claim 1 , wherein the scroll wheel segment comprises a manually operating surface arranged with friction enhancing members.
6. The delivery device of claim 1 , wherein the delivery member is a needle or a nozzle.