EP-4739372-A1 - ATTACHMENT SYSTEM FOR INJECTION MONITORING MODULE

Abstract

An injection monitoring module attachment system for mounting an injection monitoring module on an injection pen comprises a first annular body with an annular wall, and defining an inner central bore extending with a central axis. A second annular body is mounted coaxially on, and around, the first annular body and is configured to be movable relative to the first annular body, from a first position to a second position. In the first position, the second annular body exerts no inward radial force on the first annular wall. In the second position, the second annular body exerts an inward radial force on the first annular wall, thereby operating a reduction in the diameter of the first annular wall.

Inventors

• MARCOZ, Alain

Assignees

• Biocorp Production S.A.S.

Dates

Publication Date

20260513

Application Date

20230703

Claims (20)

1. [Claim 1] Attachment system configured and adapted for mounting an injection monitoring module on an injection pen comprising: a first annular body having a length and a diameter, and comprising an annular wall extending along the length from a first end to a second end, the length being greater than the diameter, the annular wall defining an inner central bore extending along the length and having a central longitudinal axis; a second annular body mounted coaxially on, and around, the second end of the first annular body; the second annular body being configured to be movable relative to the first annular body, from a first position to a second position; wherein, in the first position, the second annular body exerts no inward radial force on at least one portion of the annular wall of the first annular body, and in the second position, the second annular body exerts an inward radial force on the at least one portion of the first annular wall, wherein the inward radial force applied to the at least one portion of the first annular wall operates a reduction in the diameter of the at least one portion of the first annular wall.
2. [Claim 2] Attachment system according to claim 1, wherein the annular wall of the first annular body comprises a plurality of elastically radially deformable fingers extending towards the second end.
3. [Claim 3] Attachment system according to claim 2, wherein the plurality of elastically radially deformable fingers are distributed radially about the central longitudinal axis.
4. [Claim 4] Attachment system according to claim 2 or claim 3, wherein the elastically radially deformable fingers are deformable radially inwardly toward the central longitudinal axis, when the second annular body exerts an inward radial force on the at least one portion of the first annular wall.
5. [Claim 5] Attachment system according to any one of claims 2 to 4, wherein each finger of the plurality of elastically radially deformable fingers has a portion of inward-facing surface configured to provide surface-engaging contact with an outer peripheral surface of an injection pen body when the attachment system is mounted onto an injection pen, and the second annular body is in the second position.
6. [Claim 6] Attachment system according to any one of claims 2 to 5, wherein each finger of the plurality of elastically radially deformable fingers has a portion of inward-facing surface which is sloped from a proximal point to a distal point, along at least a portion of a length of the elastically radially deformable finger, to conform to an outer peripheral surface of an injection pen body when the attachment system is mounted onto an injection pen, and the second annular body is in the second position.
7. [Claim 7] Attachment system according to claim 1, wherein the second annular body has at least a first portion of an inward-facing surface which is configured to engage with an outward facing surface of the first annular body.
8. [Claim 8] Attachment system according to claim 7, wherein the first portion of inwardfacing surface configured to engage with an outward facing surface of the first annular body, is an annular shoulder.
9. [Claim 9] Attachment system according to claim 8, wherein, in the first position, the annular shoulder is configured to provide a distal facing surface which engages with a proximal facing surface of a nose portion located at a distal end of the first annular body, and the distal facing surface of the annular shoulder is free to rotate about the central longitudinal axis and against the proximal facing surface of the nose portion.
10. [Claim 10] Attachment system according to claim 8 or claim 9, wherein the annular shoulder of the second annular body is configured to provide an inward facing portion which engages with an outward facing and inward sloping surface of the first annular body.
11. [Claim 11] Attachment system according to any one of claims 8 to 10, wherein, when moving from the first position to the second position, the annular shoulder of the second annular body exerts an inward facing radial force onto the outward facing and inward sloped surface of the first annular body, thereby causing an inward facing surface of the first annular body to be moved inwardly toward the central longitudinal axis.
12. [Claim 12] Attachment system according to claim 1, wherein the second annular body has at least a second portion of an inward-facing surface which is configured to engage with an outward facing surface of the first annular body.
13. [Claim 13] Attachment system according to claim 12, wherein the second portion of inward-facing surface configured to engage with an outward facing surface of the first annular body is an annular ridge located proximally of the annular shoulder, and adjacent to a proximal end, of the second annular body.
14. [Claim 14] Attachment system according to claim 13, wherein, when moving from the first position to the second position, the annular ridge engages with a helical trough provided on the outward facing surface of the first annular body.
15. [Claim 15] Attachment system according to claim 13, wherein the helical trough comprises at least one, or a plurality of spires or full revolutions about and along, the central longitudinal axis.
16. [Claim 16] Attachment system according to any one of the preceding claims, wherein, in the second position, a proximal end of the second annular body abuts a distal end of the first annular body.
17. [Claim 17] Attachment system according to any one of claims 12 to 16, wherein, in the second position, the annular ridge of the second annular body comprises a proximal facing and inward sloping surface in stopping abutment with a corresponding distal facing and inward sloping surface of the first annular body.
18. [Claim 18] Attachment system according to claim to any one of the preceding claims, wherein the length of the second annular body is less than the length of the first annular body.
19. [Claim 19] Attachment system according to any one of the preceding claims, wherein the length of the second annular body is substantially equal to the length of an elastically deformable finger of the first annular body.
20. [Claim 20] Attachment system according to any one of the preceding claims, wherein the first position is the unlocked position of the attachment system.

Description

DESCRIPTION Title of Invention: Attachment System for Injection Monitoring Module [0001] The present invention relates generally to monitoring systems for injectable drug delivery devices, and in particular to an injection monitoring module for for monitoring the end of an injection when using an injection pen system. [0002] Injection monitoring is a well known field associated with injectable drug delivery devices, especially with regard to infusion systems, for example. Over time, such monitoring systems have been made available for injection pen systems for delivery of a drug, enabling users of such pen injection systems, and health care professionals involved in the treatment and follow-up of such patients, to monitor more closely the associated injection regimes, and in many cases, the doses actually administered, in an attempt to lead to better healthcare outcomes. These developments have been accompanied by the increased associated use of software and portable communications devices such as tablets or smartphones, which have been programmed to receive information from, and interact with, the monitoring systems in order to provide information to the user or healthcare professional on-the-fly, or at regular intervals via appropriate communications units included in the monitoring systems. [0003] In regard to pen injection systems in particular, for example, one of the challenges has been to provide easy to use, reliable and fairly failsafe monitoring systems that can be adapted to the various different variants of such commercially available pen injection systems, of which there are many. Previous attempts at providing such monitoring systems have usually involved adapting the body of the pen injection system by including electronic components therein along with one or more sensors. Such adapted pen injection systems tend to be very specific to a given brand or a manufacturer, and thus of little or no use with pen injection devices of other manufacturers. There has furthermore been a tendency to attempt to reduce the overall volume of the injection pen bodies as much as possible through miniaturization of the complex electronic components, which in turn has brought about its own problems, in particular with regard to electromagnetic interference between the various components due to the close proximities of the circuits providing the required or desired integrated functionality. Moving the sensors in such monitoring systems further away from the source of electromagnetic interference only further complicates matters, potentially leading to erroneous readings, or requiring further systems to compensate for the physical separation of the sensors from the other electronic components, such as a microcontroller designed to control and command the various components and manage their interactions. [0004] The injection pen systems in question are well known per se and are commonly equipped with a proximally located dose setting wheel and injection activator, the dose setting wheel being rotatable about a central longitudinal axis of the pen injection system. The wheel is rotated by the user to select the dose of drug to be administered. The pen is generally configured, either mechanically or electromechanically to effect an injection upon activation of an injection activator. Such injection activators are quite commonly a simple press or pushbutton, in mechanical or electrical contact with the dispensing mechanism located within the pen injection system, the pressing of which causes the injection mechanism to fire and inject the drug contained within the pen injection system. In some pen injector systems, the dose setting wheel is configured to rotate not only during dose setting, but also during injection. This is generally achieved through the inclusion of one or more metallic components, such as a helically wound drive spring located within a housing body of the injection pen system and physically coupled to the dose setting wheel. As such metallic elements are relatively large objects in comparison to the electronic component systems that are included in many pen injection systems today, these large metallic objects can further perturb signals that the sensors in such electronic component systems are designed to capture or pick up, rendering the systems potentially less accurate, and/or requiring that complex correction mechanisms be put in place to avoid calculation errors. [0005] Commonly commercialized injection pen systems have a variety of pen body shapes and diameters, and as a general rule, each type of injection pen has a set of dimensions that are specifically tailored for that pen, or the medicament, drug or substance intended to be administered via such an injection pen system. Additionally, each pen manufacturer, for any given brand of pen, and/or associated injectable product, may have pen bodies which vary in dimensions, in particular, in outer diameter, i.e. the diameter of a virtual circl