Insertion device for infusion sets

• US 20060135908A1
• Filed: 12/09/2005
• Published: 06/22/2006
• Est. Priority Date: 06/12/2003
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics International AG (Roche Holding AG)
• Inventors: Scheurer, Simon, Roethlisberger, Mark, Liniger, Jurg
• Granted Patent: US 7,909,791 B2
• Time in Patent Office: Days
• US Class Current: 604/93.10
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

An insertion device for infusion sets, including a housing for generally enclosing an infusion set placed in the insertion device and a drive device for displacing the infusion set, wherein the displacing is as friction-free as possible with respect to the housing.

Claims

1. An insertion device for infusion sets, comprising a housing for generally enclosing an infusion set to be placed in the insertion device and a drive device for moving the infusion set in a drive direction, wherein the drive device is configured such that a drive movement takes place free of slide friction relative to the housing.

2. The insertion device as claimed in claim 1, wherein the drive device comprises a drive mechanism connected to the housing, at least one elastic means for providing at least a portion of a driving force, and a drive endpiece to move an infusion set in a drive direction, the drive endpiece being able to be pretensioned relative to the housing by the elastic means such that the drive endpiece is moved in the drive direction when the pretensioning is released.

3. The insertion device as claimed in claim 1, wherein the drive device comprises a lever mechanism via which the drive endpiece is moved relative to the housing.

4. The insertion device as claimed in claim 3, wherein the lever mechanism is configured such that parts of the lever mechanism which move in the drive direction are spaced from the housing or at least do not execute any sliding movement relative to the housing.

5. The insertion device as claimed in claim 3, wherein the lever mechanism comprises leg levers connected in a rotatable manner via rotary connection members, at least some of the rotary connection members being movable in the drive direction.

6. The insertion device as claimed in claim 5, wherein the rotary connections members comprise at least two first oppositely turning rotary connection members movable in the drive direction, their drive movement synchronized by the coupled rotational movement of two second positionally fixed rotary connection members, one of the first rotary connection members in each case being connected to one of the second rotary connection members via a leg lever.

7. The insertion device as claimed in claim 1, wherein the drive device comprises a drive endpiece to move an infusion set in the drive direction, and elastic means compressable counter to the drive direction in order to pretension said elastic means, which expands in the drive direction when the tension is released, the drive endpiece being arranged on one end of the elastic means, the elastic means being connected at an opposite end to the housing.

8. The insertion device as claimed in claim 7, wherein, when the tension is released, the elastic means provides no expansion movement deviating from the drive direction.

9. The insertion device as claimed in claim 7, wherein the elastic means comprises parts which expand when the tension is released, said parts not in contact with the housing.

10. The insertion device as claimed in claim 3, wherein the lever mechanism is articulated on the housing at least laterally from the drive direction in order to guide the drive endpiece in the drive direction.

11. The insertion device as claimed in claim 10, wherein the lever mechanism comprises a lemniscate guide which guides the drive member in the drive direction.

12. The insertion device as claimed in claim 10, wherein the lever mechanism is articulated on the housing at least at one position and the drive endpiece rotates about this position via at least one leg lever without making contact with the housing.

13. The insertion device as claimed in claim 1, wherein the drive device comprises elastic means connecting the housing and a drive endpiece such that the elastic means is elastically expanded when the drive endpiece is moved counter to the drive direction.

14. The insertion device as claimed in claim 13, wherein the elastic means comprises expandable bands which are arranged symmetrically around the drive endpiece to maintain the drive endpiece on an intended path of movement in the drive direction, the drive endpiece remaining at a distance from the housing on the path of movement.

15. The insertion device as claimed in claim 2, wherein the drive endpiece is adapted to receive the infusion set.

16. The insertion device as claimed in claim 2, wherein the housing has an infusion set holder adapted to receive an infusion set, the holder arranged such that the drive endpiece, when moved in the drive direction, strikes an infusion set out of the holder, and the drive device is designed such that, in the pretensioned state, there is no contact between an infusion set in the holder and drive endpiece.

17. The insertion device as claimed in claim 2, comprising at least one rotary connection member on a side wall of the housing and a least one leg lever connected by a first end to the at least one rotary connection member, the leg lever being able to be pretensioned by the elastic means against the side wall, a second end of the leg lever remote from the first end adapted to receive an infusion set or to strike an infusion set out of a holding fixture, the leg lever is pivoted via the at least one rotary connection member when the tension of the elastic means is removed by a release mechanism.

18. An insertion device for introducing an infusion set, comprising

a housing for receiving the infusion set;

and

a drive device for moving the infusion set in a drive direction, the drive device comprising;

a drive mechanism connected to the housing;

at least one elastic member for providing at least a portion of a driving force; and

a drive endpiece to move the infusion set in the drive direction, the drive endpiece being able to be pretensioned relative to the housing by the elastic member such that the drive endpiece is moved in the drive direction when the pretensioning is released.

19. The insertion device according to claim 18, the drive mechanism comprising at least one rotary connection member on a side wall of the housing and at least one leg lever connected by a first end to the at least one rotary connection member, the leg lever being able to be pretensioned relative to the side wall by one or more of the at least one elastic member, the drive endpiece comprising a second end of the leg lever adapted to receive the infusion set or to strike the infusion set out of a holding fixture, the leg lever pivotally moveable via the at least one rotary connection member when the tension of the elastic member is released by a release mechanism.