Dosing system for an injection device

Patent metadata

Field	Value
Publication number	US-12403264-B2
Application number	US-202117467908-A
Country	US
Kind code	B2
Filing date	Sep 7, 2021
Priority date	Mar 15, 2019
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A dosing system for an injection device for dispensing a dose of a product includes a housing having a longitudinal axis, a dose-setting element, a holding element and a coupling sleeve for driving a driving device for dispensing the dose. The dose-setting element, holding element, and coupling sleeve may be accommodated in the housing. To set and correct the dose, the dose-setting element and the coupling sleeve move in the direction of the longitudinal axis relative to the housing, and the coupling sleeve may be held the holding element rotationally fixed by relative to the housing. To dispense the dose, the coupling sleeve may rotate relative to the housing, the dosing system including a guide in the housing, in which guide the holding element may be displaced in the direction of the longitudinal axis relative to the housing and be guided in a rotationally fixed manner relative to the housing.

First claim

What is claimed is:

1. A dosing device for an injection apparatus for dispensing a dose of a product, comprising:
a housing having a longitudinal axis;
a dose setting element configured as a dosing sleeve for setting the dose;
a holding element, wherein the holding element is coupled to the dosing sleeve such that the holding element and the dosing sleeve are rotatable but axially fixed relative to each other; and
a coupling sleeve for driving a drive device to dispense the dose, wherein at least a portion of the dose setting element, the holding element, and the coupling sleeve are arranged in the housing,
wherein for setting and correcting the dose, the dosing sleeve, the holding element and the coupling sleeve are configured to be moved relative to the housing in the direction of the longitudinal axis, and the coupling sleeve is configured to be held in a rotationally fixed manner relative to the housing by the holding element,
wherein for dispensing the dose, the coupling sleeve is releasable by the holding element, such that the coupling sleeve is rotatable relative to the housing, and
wherein the housing comprises a guide in which the holding element is displaceable along the longitudinal axis relative to the housing during the setting and correction of the dose, such that the holding element is guided in a rotationally fixed manner relative to the housing.

2. The dosing device according to claim 1 , wherein to dispense the dose, the coupling sleeve is releasable by the holding element by a displacement of the coupling sleeve relative to the holding element along the longitudinal axis.

3. The dosing device according to claim 2 , wherein the displacement of the coupling sleeve enables the coupling sleeve to be coupled to the dose setting element in a rotationally fixed manner.

4. The dosing device according to claim 3 , wherein the coupling sleeve is coupleable to the dose setting element in a rotationally fixed manner by a toothed engagement.

5. The dosing device according to claim 1 , wherein the coupling sleeve is configured to be held in a rotationally fixed manner relative to the holding element by a toothed engagement.

6. The dosing device according to claim 1 , wherein the guide comprises a groove, and the holding element is guided in the groove in a rotationally fixed manner relative to the housing by a cam.

7. The dosing device according to claim 1 , wherein the holding element defines an opening in which the coupling sleeve is received.

8. The dosing device according to claim 1 , further comprising an elastic element configured to bias the coupling sleeve via a biasing force in a dosing position in which the coupling sleeve is held in a rotationally fixed manner relative to the holding element.

9. The dosing device according to claim 8 , wherein the elastic element comprises a base body with at least two elastic arms, wherein the base body is oriented in a plane perpendicular to the longitudinal axis, wherein a first of the at least two arms points in a proximal direction of the dosing device, and a second of the at least two arms points in a distal direction of the dosing device.

10. The dosing device according to claim 9 , wherein the dose setting element comprises teeth, and the coupling sleeve comprises teeth, wherein the first of the at least two arms of the elastic element slides over the teeth of the dose setting element or over the teeth of the coupling sleeve to generate an acoustic or tactile signal.

11. The dosing device according to claim 8 , wherein the dose setting element and the coupling sleeve each comprise a flange in a proximal region, and the elastic element is arranged between the flanges.

12. The dosing device according to claim 1 , further comprising a housing insert, the housing insert comprising a recess which forms the guide for guiding the holding element.

13. The dosing device according to claim 12 , wherein the housing insert comprises an internal thread with which the dose setting element is threadedly engaged.

14. An injection device for dispensing a dose, the injection device comprising:
a carpule holder for holding a carpule with a medicinal substance;
a needle or cannula; and
a dosing device, the dosing device comprising:
a housing having a longitudinal axis;
a dose setting element configured as a dosing sleeve for setting the dose;
a holding element, wherein the holding element is coupled to the dosing sleeve such that the holding element and the dosing sleeve are rotatable but axially fixed relative to each other; and
a coupling sleeve for driving a drive device to dispense the dose, wherein at least a portion of the dose setting element, the holding element, and the coupling sleeve are arranged in the housing,
wherein for setting and correcting the dose, the dosing sleeve, the holding element and the coupling sleeve are movable relative to the housing in the direction of the longitudinal axis, and the coupling sleeve is configured to be held in a rotationally fixed manner relative to the housing by the holding element,
wherein for dispensing the dose, the coupling sleeve is releasable by the holding element, such that the coupling sleeve is rotatable relative to the housing, and
wherein the housing comprises a guide in which the holding element is displaceable along the longitudinal axis relative to the housing during the setting and correction of the dose, such that the holding element is guided in a rotationally fixed manner relative to the housing.

15. The injection device according to claim 14 , further comprising an elastic element for biasing the coupling sleeve via a biasing force in a dosing position in which the coupling sleeve is held in the rotationally fixed manner relative to the holding element.

16. The injection device according to claim 15 , wherein to dispense the dose, the coupling sleeve is releasable by the holding element out of the dosing position by a displacement of the coupling sleeve relative to the holding element along the longitudinal axis.

17. The injection device according to claim 15 , wherein the dose setting element and the coupling sleeve each comprise a flange in a proximal region, and the elastic element is arranged between the flanges.

18. A dosing device for an injection apparatus for dispensing a dose of a product, comprising:
a housing having a longitudinal axis;
a dose setting element configured as a dosing sleeve for setting the dose;
a holding element, wherein the holding element is coupled to the dosing sleeve such that the holding element and the dosing sleeve are rotatable but axially fixed relative to each other; and
a coupling sleeve for driving a drive device to dispense the dose,
wherein for setting and correcting the dose, the dosing sleeve, the holding element and the coupling sleeve are movable relative to the housing in the direction of the longitudinal axis, and the coupling sleeve is configured to be held in a rotationally fixed manner relative to the housing by the holding element,
wherein for dispensing the dose, the coupling sleeve is releasable by the holding element by a displacement of the coupling sleeve relative to the holding element along the longitudinal axis, such that the coupling sleeve is rotatable relative to the housing, and
wherein the housing comprises a guide in which the holding element is displaceable along the longitudinal axis relative to the housing during the setting and correction of the dose, such that the holding element is guided in a rotationally fixed manner relative to the housing.

Assignees

• Ypsomed Ag

Inventors

• Scheurer Simon
• Hostettler Patrick
• Hirschel Jürg

Classifications

• A61M5/31548

  Mechanically operated dose setting member · CPC title

• A61M5/31533

  Dosing mechanisms, i.e. setting a dose (administrating mechanisms A61M5/31565) · CPC title

• A61M5/31528

  by means of rotational movements, e.g. screw-thread mechanisms · CPC title

• A61M2205/582

  by tactile feedback · CPC title

• A61M2205/581

  by audible feedback · CPC title