Autoinjector
AssigneeSanofi-Aventis Deutschland GmbH
InventorThomas Kemp
Life of this patent
Estimating the term…
Abstract
An autoinjector includes a case having a rib, a needle shroud telescopically coupled to the case, a carrier slidably arranged in the case and adapted to hold a medicament container, and a collar rotatably and slidably disposed in the case and coupled to the needle shroud and the carrier. The needle shroud is movable between a first extended position, a retracted position and a locked second extended position. The carrier is movable from a first axial position to a second axial position relative to the case. The collar abuts the rib when the needle shroud is in the first extended position and the carrier is in the first axial position, and the collar disengages the rib when the needle shroud is in the retracted position and the carrier is in the second axial position.
Claims14
An autoinjector (1) comprising:
- a case (2) having a rib (2.9);
- a needle shroud (7) telescopically coupled to the case (2) and movable between a first extended position (EP), a retracted position (RP) and a locked second extended position (SEP);
- a carrier (8) slidably arranged in the case (2) and adapted to hold a medicament container, the carrier (8) movable from a first axial position to a second axial position relative to the case (2);
- and
- a collar (16) rotatably and slidably disposed in the case (2), the collar (16) coupled to the needle shroud (7) and the carrier (8),
- wherein the collar (16) abuts the rib (2.9) when the needle shroud (7) is in the first extended position (EP) and the carrier (8) is in the first axial position, and the collar (16) disengages the rib (2.9) when the needle shroud (7) is in the retracted position (RP) and the carrier (8) is in the second axial position,
- wherein the collar (16) includes a shroud boss (18) adapted to engage a shroud slot (17) in the needle shroud (7), a carrier boss (20) adapted to engage a carrier slot (19) in the carrier (8) and a case boss (22) adapted to engage the rib (2.9) in the case (2),
- the autoinjector (1) further comprising a control spring (9) biasing the collar (16) in a distal direction (D) relative to the case (2),
- wherein the collar (16), dependent on the relative axial and rotational position in relation to the needle shroud (7), the carrier (8) and the rib (2.9) in the case (2), couples the force of the control spring (9) to either the carrier (8), the needle shroud (7) or the case (2).
The autoinjector (1) according to any one of the preceding claims, wherein the shroud boss (18), the carrier boss (20) and the case boss (22) are disposed in approximately a same plane on the collar (16).
The autoinjector (1) according to any one of the preceding claims, wherein the collar (16) is in a first angular position relative to the case (2) when the needle shroud (7) is in the first extended position (EP) and the carrier (8) is in the first axial position.
The autoinjector (1) according to any of the preceding claims, further comprising:
- a trigger button (13) coupled to or integral with the carrier (8).
Dependencies are inferred from the claim text.