Support structure, medicament delivery device and method of assemblying
AssigneeShl Medical AG
InventorAnders Boström
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a support structure for a medicament container used in a medicament delivery device. The support structure accommodates an elongated plunger rod and a drive spring and can have a tubular body having a predetermined radial dimension, a longitudinal axis (A), a distal end and a proximal end and at least one first flexible element arranged at the proximal end of the tubular body and having the same radial outer and inner dimensions as the tubular body. The flexible element is provided with a contact member with an outer radial dimension extending the outer dimension of the tubular body for compensating of manufacturing tolerances of the medicament containers made of glass.
Claims20
An elongated support structure for supporting a distal end of a medicament container in a medicament delivery device, the support structure comprises:
- a tubular body having an inner dimension and an outer dimension, a longitudinal axis, a distal end and a proximal end;
- at least one first flexible element arranged at the proximal end of the tubular body and having a same outer dimension and a same inner dimension as the tubular body;
- and
- a rotational member positioned on an outer circumferential surface of the tubular body,
- wherein the at least one first flexible element is provided with a contact member which is situated on an outer surface of the at least one first flexible element, and which outer radial dimension extends over the at least one first flexible element outer dimension enlarging a contact area of the at least one first flexible element,
- wherein the outer surface faces away from the longitudinal axis, and wherein the contact member is arranged to contact the distal end of the medicament container,
- wherein the rotational member includes a recess configured to receive and guide the contact member along the longitudinal axis, and
- wherein the at least one first flexible element is configured to be guided by the contact member to flex inwardly.
A drive mechanism for operatively engaging a medicament container in a medicament delivery device, where the drive mechanism comprises:
- a tubular support structure having a tubular body;
- a tubular hollow plunger rod positioned within and axially slidable relative to the tubular support structure;
- a compressed drive spring positioned partially within the plunger rod;
- and
- a rotational member positioned on an outer circumferential surface of the tubular body such and that rotates from a first position to a second position, where when the rotational member is in the second position the drive spring decompresses to move the plunger rod proximally relative to the tubular support structure,
- wherein the tubular support structure has an inner dimension and an outer dimension, a longitudinal axis, a distal end and a proximal end and two first flexible elements arranged at the proximal end of the tubular body and having an outer dimension and an inner dimension equal to the outer and the inner dimensions of the tubular body,
- wherein each flexible element is provided with a contact member which protrudes radially outward from an outer surface of the flexible element enlarging a contact area of each flexible element,
- wherein the outer surface of each flexible element faces away from the longitudinal axis,
- wherein each contact member is configured to contact a distal end of the medicament container,
- wherein the rotational member includes a recess configured to receive and guide the contact member along the longitudinal axis, and
- wherein each flexible element is configured to be guided by the contact member to flex inwardly.
Dependencies are inferred from the claim text.