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A screwless quick connection system for connecting a lead connector to a generator of an active implantable medical device is shown and described. The connector head includes a housing receiving a plug of a lead connector. A mechanism for locking the plug into the housing is provided by a U-folded l

A screwless quick connection system for connecting a lead connector to a generator of an active implantable medical device is shown and described. The connector head includes a housing receiving a plug of a lead connector. A mechanism for locking the plug into the housing is provided by a U-folded leaf spring. Each branch of the U is provided with a respective hole sized so that the plug passes through the holes on both branches when it is inserted into the housing. The blade is deformable between a free state, in the absence of plug, and a deformed state, with the plug inserted therein. In the free state, both holes are misaligned, while in the deformed state they are aligned. In this way, an edge of both holes exerts by reaction a radial stress force against the smooth outer surface of the plug inserted therein.

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1. A connector head for coupling a lead to a generator body, the connector head comprising: at least one housing for receiving a plug end of a lead along an axis of insertion;an elastic element configured to receive and immobilize the plug in the housing, wherein the elastic element comprises a U-sh

1. A connector head for coupling a lead to a generator body, the connector head comprising: at least one housing for receiving a plug end of a lead along an axis of insertion;an elastic element configured to receive and immobilize the plug in the housing, wherein the elastic element comprises a U-shaped leaf spring having a first branch and a second branch, the first and second branches having respective first and second holes that allow the plug to be inserted through the first and second holes in the housing;wherein the U-shaped leaf spring is deformable between a free state, wherein the leaf spring is in a neutral position, and a deformed state, wherein the leaf spring takes on an expanded position;wherein in the free state, the projections of the first and second holes in a plane perpendicular to the axis of insertion are misaligned;wherein in the deformed state the projections of the first and second holes in the plane perpendicular to the axis of insertion are sufficiently aligned to receive an inserted plug so that an edge of each of the first and second holes contact the plug inserted therein and exert a radial stress force against the plug, producing a retaining force against extraction of the plug in a direction opposite to the insertion; andwherein the elastic element further comprises a release mechanism configured to receive an external force on the elastic element to neutralize said retaining force and thereby permit a removal of the plug from the housing;wherein the release mechanism is a flange at a free end of one of the first branch and the second branch of the U-shaped leaf spring, extending in a plane substantially parallel to the axis of insertion. 2. The connector head of claim 1, wherein the flange comprises a flattened pushbutton extending in a plane substantially parallel to the axis of insertion. 3. The device of claim 1, wherein the flange comprises a tactile device causing a tactile response to the change of state between the free and deformed states. 4. The connector head of claim 1, wherein the release mechanism is configured such that the external force on the release mechanism causes expansion of the U-shaped leaf spring. 5. The connector head of claim 1, wherein in the free state, the projections of the first and second holes in a plane perpendicular to the axis of insertion are overlapping but misaligned. 6. The connector head of claim 1, wherein the first branch extends along a plane that is substantially perpendicular to the axis of insertion. 7. The connector head of claim 1, wherein the second branch extends along a plane that is substantially oblique to, forming an angle in a range selected from between 45′ and 75° from, the axis of insertion. 8. The connector head of claim 1, wherein the generator comprises an electrical connection terminal and the leaf spring comprises a metal blade connected to the electrical connection terminal, so as to simultaneously achieve the mechanical immobilization of the plug in the housing and the electrical connection of the plug to the electrical connection terminal. 9. The connector head of claim 1, wherein the connector head comprises more than one housing for receiving in the connector head more than one plug end of the lead, and wherein the connector head comprises more than one elastic element for receiving the more than one plug end. 10. The connector head of claim 9, wherein a first plug end is received by a first leaf spring positioned on a first side of the connector head and a second plug end is received by a second leaf spring positioned on a second side of the connector head opposite the first side. 11. A method for receiving and retaining a lead in a connector head of a generator body, the method comprising: providing a connector head comprising: a housing for receiving a plug end of a lead along an axis of insertion; andan elastic element configured to receive and immobilize the plug in the housing, wherein the elastic element comprises a U-shaped leaf spring having a first branch and a second branch, the first and second branches having respective first and second holes that allow the plug to be inserted through the first and second holes in the housing;wherein the U-shaped leaf spring is deformable between a free state, wherein the leaf spring is in a neutral position, and a deformed state, wherein the leaf spring takes on an expanded position;wherein in the free state, the projections of the first and second holes in a plane perpendicular to the axis of insertion are misaligned;wherein the elastic element further comprises a release mechanism configured to receive an external force on the elastic element;exerting a pressure on the release mechanism to expand the leaf spring, thereby deforming the leaf spring from the free state to the deformed state, such that the first and second holes in a plane perpendicular to the axis of insertion are aligned to receive the plug end of the lead;inserting the plug end of the lead into the housing and through the first and second holes of the leaf spring; andretaining the plug end of the lead in the housing by releasing the pressure on the release mechanism, wherein releasing the pressure causes the leaf spring to move from the expanded deformed state towards the free state, thereby causing an edge of each of the first and second holes to contact the plug inserted therein and exert a radial stress force against the plug, and thereby producing a retaining force against extraction of the plug in a direction opposite to the insertion;wherein the leaf spring is prevented from fully achieving the free state when the plug end is inserted in the first and second holes. 12. The method of claim 11, further comprising exerting a second pressure on the release mechanism to deform the leaf spring to the deformed state such that the plug end of the lead can be extracted from the first and the second holes. 13. The method of claim 11, wherein in the free state, the projections of the first and second holes in a plane perpendicular to the axis of insertion are overlapping but misaligned. 14. The method of claim 11, wherein retaining the plug end of the lead in the housing further provides an electrical connection between the lead and the generator. 15. The method of claim 14, wherein the generator comprises an electrical connection terminal and the leaf spring comprises a metal blade connected to the electrical connection terminal, so as to simultaneously achieve retaining the plug in the housing and the electrical connection of the plug to the electrical connection terminal. 16. The method of claim 11, further comprising inserting a plug end of a second lead into a second housing having a second leaf spring in the connector head, and retaining the plug end of the second lead in the second housing by the second leaf spring. 17. An implantable medical device comprising a generator and connector head, the connector head comprising: a housing for receiving a plug of a lead connector;a locking mechanism for locking the plug into the housing, wherein the locking mechanism comprises a folded leaf spring;wherein each branch of the leaf spring is provided with a hole sized to receive the plug therethrough when the plug is inserted into the housing;wherein the leaf spring is deformable between a free state in the absence of the plug and a deformed state with the plug inserted through the hole in each branch of the leaf spring;wherein the leaf spring takes on an expanded position in the deformed state;wherein the holes are misaligned in the free state and substantially aligned in the deformed state such that when a plug is inserted into the housing an edge of both holes exerts by reaction a radial stress force against an outer surface of the plug inserted therein; andwherein the leaf spring further comprises a release mechanism configured to receive a force to move the leaf spring towards the deformed state to receive the plug or to relieve the radial stress on the plug, and wherein the release mechanism is a flange at a free end of one of the first branch and the second branch of the U-shaped leaf spring, extending in a plane substantially parallel to the axis of insertion. 18. The implantable medical device of claim 17, wherein the locking mechanism further comprises a release mechanism configured to receive an external force to deform the leaf spring into the deformed state. 19. The implantable medical device of claim 18, wherein the release mechanism is configured to receive the external force by a maneuver on only one side of the connector head.