Administration mechanism for a medicament delivery training device

Patent metadata

Field	Value
Publication number	US-11276327-B2
Application number	US-201716307871-A
Country	US
Kind code	B2
Filing date	May 10, 2017
Priority date	Jun 8, 2016
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

The present disclosure relates to an administration mechanism (9) for a medicament delivery training device. The administration mechanism (9) comprises a longitudinal medicament delivery member cover (7) configured to be biased in a proximal direction, a rotator (11) configured to be received by the longitudinal medicament delivery member cover (7), the rotator (11) being rotatable relative to the medicament delivery member cover (7), wherein the medicament delivery member cover (7) is linearly displaceable relative to the rotator (11), and wherein the rotator (11) has a guide structure (12) configured to guidedly cooperate with the medicament delivery member cover (7) to cause the rotator (11) to rotate when the medicament delivery member cover (7) is displaced linearly relative to the rotator (11), wherein the medicament delivery member cover (7) is linearly displaceable relative to the rotator (11) from an initial position in which the medicament delivery member cover (7) is prevented from proximal displacement, to a distal position located distally relative to the initial position, thereby rotating the rotator (11) in a first direction, wherein the medicament delivery member cover (7) is linearly displaceable from the distal position to a proximal position located proximally relative to the initial position, thereby rotating the rotator (11) in a second direction opposite to the first direction, and wherein the medicament delivery member cover (7) is linearly displaceable from the proximal position to the initial position.

First claim

The invention claimed is:

1. An administration mechanism for a medicament delivery training device that has no medicament container, no medicament, no medicament container holder, no needle, no plunger rod, and no plunger holder, wherein the administration mechanism comprises:
a longitudinal medicament delivery member cover slidably positioned within a housing of the training device, the medicament delivery member cover comprising,
an outer surface having a terminal distal end;
a flange extending radially outward from the outer surface at a location that is proximal to the distal end; and
a distal end arm formed from a cut-out in the outer surface, where the cut-out begins proximally of the location of the flange and ends at the terminal distal end, where the distal end arm is flexible in an outward radial direction and comprises a protrusion projecting radially inward;

a resilient member surrounding an outer distal portion of the outer surface, where the resilient member comprises a distal end and a proximal end that engages the outer surface at a location proximal to the cut-out such that the medicament delivery member cover is biased axially in a proximal direction;
a rotator positioned within the distal portion of the medicament delivery member cover, the rotator being rotatable relative to the medicament delivery member cover; and
an insert positioned within the housing, where the insert is axially fixed relative to the rotator while allowing the rotator to freely rotate relative to the insert,
wherein the insert further comprises a stop surface that abuts the distal end of the resilient member,
wherein the medicament delivery member cover is linearly displaceable relative to the rotator, and wherein the rotator has a guide structure that is slidably engaged with the protrusion such that the rotator will rotate when the medicament delivery member cover is displaced linearly relative to the rotator,
wherein the medicament delivery member cover is linearly displaceable relative to the rotator from an initial position in which the medicament delivery member cover is prevented from proximal displacement, to a distal position located distally relative to the initial position, thereby rotating the rotator in a first direction, where movement to the distal position causes the distal end arm to flex radially outward and then to flex radially inward causing an audible click when the medicament delivery member cover has reached the distal position,
wherein the medicament delivery member cover is linearly displaceable from the distal position to a proximal position located proximally relative to the initial position, thereby rotating the rotator in a second direction opposite to the first direction,
wherein the linear displacement of the medicament delivery cover when moving from the distal position to the proximal position is equal to an axial distance between the location of the flange and an inner surface of the housing when the medicament delivery cover is in the distal position, and
wherein the medicament delivery member cover is linearly displaceable from the proximal position to the initial position.

2. The administration mechanism as claimed in claim 1 , wherein the guide structure has a groove that forms a loop and the medicament delivery member cover has a protrusion configured to run in the groove to allow the medicament delivery member cover to cooperate with the rotator.

3. The administration mechanism as claimed in claim 2 , wherein the loop is a closed loop.

4. The administration mechanism as claimed in claim 2 , wherein the groove is designed to enable the rotator to rotate back to the same rotational position as when the medicament delivery member cover is in the initial position, when the medicament delivery member cover is displaced from the distal position to the proximal position.

5. The administration mechanism as claimed in claim 3 , wherein the loop has a triangular shape.

6. The administration mechanism as claimed in claim 5 , wherein a first leg of the triangular-shaped loop is parallel with a central axis of the rotator, wherein a second leg of the triangular shaped loop is at an angle with the first leg, and wherein a third leg of the triangular shaped loop connects the first leg and the second leg.

7. The administration mechanism as claimed in claim 6 , wherein a position of the protrusion of the medicament delivery member cover in a region of a first vertex defined by the meeting point of the first leg and the second leg corresponds to the initial position of the medicament delivery member cover.

8. The administration mechanism as claimed in claim 6 , wherein a position of the protrusion of the medicament delivery member cover in a region of a second vertex defined by a meeting point of the second leg and the third leg corresponds to the distal position of the medicament delivery member cover.

9. The administration mechanism as claimed in claim 6 , wherein a position of the protrusion of the medicament delivery member cover in a region of a third vertex defined by a meeting point of the third leg and the first leg corresponds to the proximal position of the medicament delivery member cover.

10. The administration mechanism as claimed in claim 6 , wherein the first leg has a first heel configured to allow the protrusion of the medicament delivery member cover to pass the first heel in the distal direction and to prevent the protrusion from passing the first heel from the initial position in the proximal direction.

11. The administration mechanism as claimed in claim 6 , wherein the second leg has a second heel configured to allow the protrusion of the medicament delivery member cover to pass the second heel in a direction from the initial position to the distal position and to prevent the protrusion from entering into the second leg from the distal position in a direction from the distal position to the initial position.

12. The administration mechanism as claimed in claim 6 , wherein the third leg has a third heel configured to allow the protrusion of the medicament delivery member cover to pass the third heel in a direction from the distal position to the proximal position and to prevent the protrusion to pass the third heel from the proximal position in a direction form the proximal position to the distal position.

13. The administration mechanism as claimed in claim 2 , wherein the medicament delivery member cover has radially flexible distal portion, wherein the protrusion is provided on an inner surface of the radially flexible distal portion.

14. A medicament delivery training device comprising:
a housing, and
an administration mechanism as claimed in claim 1 ,
wherein the housing is configured to receive the administration mechanism and wherein the medicament delivery member cover is configured to be rotationally locked relative to the housing.

15. The medicament delivery training device as claimed in claim 14 , comprising a resilient member configured to bias the medicament delivery member cover in the proximal direction.

Assignees

• Shl Medical Ag

Inventors

• Boström Anders

Classifications

• G09B23/285 Primary

  for injections, endoscopy, bronchoscopy, sigmoidscopy, insertion of contraceptive devices or enemas · CPC title

• A61M5/2033

  Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287) · CPC title

• A61M2005/2013

  triggering of discharging means by contact of injector with patient body · CPC title

• G09B23/00 Primary

  Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes (in the nature of toys A63H) · CPC title