Adaptor for a drug delivery device and drug delivery device
The present invention relates to adaptor ( 30 ) for a drug delivery device having a reservoir ( 12 ) and a longitudinal tip ( 20 ), the adaptor ( 30 ) comprising a distal part defining a connecting ring ( 31 ) intended to receive a connector, and a proximal part defining a mounting ring ( 33 ) having an inner surface ( 34 ), the mounting ring ( 33 ) being shaped and configured such that, when the adaptor ( 30 ) is mounted around the longitudinal tip ( 20 ) of the drug delivery device, at least one annular space ( 38 ) is created between the inner surface ( 34 ) of the mounting ring ( 33 ) and the outer surface ( 20 a ) of the longitudinal tip ( 20 ), the at least one annular space ( 38 ) being able to accommodate an adhesive layer ( 40 ) in order to bond the adaptor ( 30 ) to the longitudinal tip. The invention further relates to a drug delivery device comprising such an adaptor.
1 . An adaptor for a drug delivery device comprising:
a distal part that defines a connecting ring, wherein the connecting ring is designed to receive a connector; and
a proximal part that defines a mounting ring, wherein the mounting ring has an inner surface, and wherein the mounting ring is shaped and configured such that, when the adaptor is mounted around the longitudinal tip of the drug delivery device, at least one annular space is created between the inner surface of the mounting ring and an outer surface of the longitudinal tip, the at least one annular space being able to accommodate an adhesive layer in order to bond the adaptor to the longitudinal tip, wherein an annular ring is provided at a distal extremity of the inner surface of the mounting ring, and
wherein the inner surface of the mounting ring comprises at least one protrusion where, when the adaptor is mounted around the longitudinal tip of the drug delivery device, the at least one protrusion protrudes into the at least one annular space, the at least one protrusion being in the form of transversal segments.
2 . The adaptor of claim 1 , wherein R1 is defined to be a radius of an inner diameter of the mounting ring and R2 is defined to be a radius of an inner diameter of the annular ring, such that R1 is greater than R2, wherein the inner surface of the mounting ring and a proximal wall of the annular ring define an inner annular recess of the mounting ring such that the inner annular recess is open at its proximal end and closed at its distal end by the proximal wall of the annular ring, and wherein the inner annular recess has a radius R3 corresponding to R1-R2, where R3 ranges from 0.3 mm to 0.5 mm.
3 . The adaptor of claim 1 , wherein the adaptor is made of rigid plastic.
4 . The adaptor of claim 1 , wherein the adaptor is formed from a single piece of material.
5 . The adaptor of claim 1 , wherein the adaptor is made of a light-transmitting material.
6 . A drug delivery device comprising:
a reservoir and a longitudinal tip, wherein the longitudinal tip has an outer surface and a longitudinal channel for dispensing any material stored into the reservoir; and
an adaptor comprising:
a distal part that defines a connecting ring, wherein the connecting ring is designed to receive a connector; and
a proximal part that defines a mounting ring, wherein the mounting ring has an inner surface, and wherein the mounting ring is shaped and configured such that, when the adaptor is mounted around the longitudinal tip of the drug delivery device, at least one annular space is created between the inner surface of the mounting ring and an outer surface of the longitudinal tip, the at least one annular space being able to accommodate an adhesive layer in order to bond the adaptor to the longitudinal tip, wherein an annular ring is provided at a distal extremity of the inner surface of the mounting ring, and
wherein the inner surface of the mounting ring comprises at least one protrusion where, when the adaptor is mounted around the longitudinal tip of the drug delivery device, the at least one protrusion protrudes into the at least one annular space, the at least one protrusion being in the form of transversal segments.
7 . The drug delivery device of claim 6 , wherein the adaptor is permanently bonded to the longitudinal tip by an adhesive layer located in the annular space.
8 . The drug delivery device of claim 7 , wherein the adhesive layer has a thickness of at least 0.3 mm.
9 . The drug delivery device of claim 7 , wherein the adhesive layer covers an area of at least 20 mm 2 of the outer surface of the longitudinal tip.
10 . The drug delivery device of claim 7 , wherein the at least one protrusion protrudes into the adhesive layer.
11 . The drug delivery device of claim 6 , wherein the longitudinal tip does not have any mechanical attachment via either an annular groove or a ring.
12 . The drug delivery device of claim 7 , wherein the adaptor is exclusively bonded to the drug delivery device by the adhesive layer.
13 . The drug delivery device of claim 6 , wherein the inner surface of the mounting ring is substantially parallel to the outer surface of the longitudinal tip.
14 . The drug delivery device of claim 6 , wherein the longitudinal tip is made of glass.