Insertion system and insertion device

1. An insertion system comprising a base unit for placing on the body of a patient and an insertion device that can be coupled to the base unit, whereby the insertion device comprises:

an insertion needle holder for holding an insertion needle;

a drive mechanism for moving the insertion needle holder in a puncturing direction; and

a locking mechanism that effects locking of the drive mechanism in an active state and is transitioned to an inactive state, in which the locking is released, by coupling the insertion device to the base unit; wherein the locking mechanism comprises a slider that is displaced from the active state to the inactive state upon a switch of the locking mechanism, the slider being coupled to a latching element that is slid into an engagement position when the insertion device is coupled to the base unit, in which engagement position it connects the insertion device to the base unit in a positive fit-type manner.

2. An insertion device for an insertion system having a base unit for placing on the body of a patient, the insertion device comprising:

an insertion needle holder for holding an insertion needle;

a drive mechanism for moving the insertion needle holder in a puncturing direction; and

a locking mechanism that effects locking of the drive mechanism in an active state and is transitioned to an inactive state, in which the locking is released, by coupling the insertion device to the base unit; wherein the locking mechanism comprises a slider that is displaced from the active state to the inactive state upon a switch of the locking mechanism, the slider being coupled to a latching element that is slid into an engagement position when the insertion device is coupled to the base unit, in which engagement position it connects the insertion device to the base unit in a positive fit-type manner.

3. The insertion device according to claim 2 , characterized in that the slider can be displaced in the puncturing direction.

4. The insertion device according to claim 2 , characterized in that the slider is subjected to the action of a spring.

5. The insertion device according to claim 2 , characterized in that the spring relaxes upon a switch of the locking mechanism to the inactive state.

6. The insertion device according to claim 2 , further comprising a blockade element that blocks a displacement of the latching element in the active state of the locking mechanism.

7. The insertion device according to claim 6 , characterized in that the blockade element is moved transverse to the direction, in which the latching element is displaced, when the insertion device is coupled to the base unit, and thus a displacement path leading towards the engagement position is released for the latching element.

8. The insertion device according to claim 2 , characterized in that the slider is coupled to the latching element by means of an articulated joint.

9. The insertion device according to claim 2 , characterized in that the locking mechanism, in the active state, blocks an actuating element of the drive mechanism.

10. The insertion device according to claim 9 , characterized in that the drive mechanism, in operation, converts a drive motion of the actuating element into a puncturing motion of the insertion needle holder.

11. The insertion device according to claim 2 , characterized by a linear guidance for the slider.

12. The insertion device according to claim 2 , characterized in that the drive mechanism effects a returning motion of the insertion needle holder subsequent to a puncturing motion, and is blocked after the returning motion is completed.

13. The insertion device according to claim 2 , characterized in that the locking element includes a protection element which, in the active state of the locking mechanism, is situated in front of an insertion needle that is held by the insertion needle holder.