Electrical connection plug for multipolar lead of active implantable medical device

摘要

A plug includes a pin having an axial contact at its opposite end with a mounting rod connected to a center conductor. At the interface between the pin and the inner wall of the plug body, a support sleeve mounted on the shaft and bearing axially against a collar formed on said rod is provided. Axially, a locking ring is secured to the shaft so that the support sleeve is clamped between the collar of the rod and the locking ring, if necessary, leaving a degree of freedom of rotation between the sleeve and the pin. Radially, the outer surface of the sleeve comes into direct contact with the inner wall of the bore of the plug body, to which it is directly secured. The direct attachment of the sleeve to the plug body may be obtained by a snap-in connection with notches cooperating with a counterpart groove.

主权项

1. An electrical connection plug for a multipolar lead of an active implantable medical device, the electrical connection plug comprising:
an axial pin having a free end forming an axial electrical contact, a mounting rod adapted to connect with an inner central conductor, and a flange extending radially from the axial pin between the free end and the mounting rod; a retaining sleeve having a cylindrical bore through which the axial pin is inserted, a first end face of the retaining sleeve abutting the flange extending radially from the axial pin, and a second end face opposite the first end face; a locking ring inserted onto the axial pin and fixedly attached to the axial pin such that the locking ring abuts the second end face of the retaining sleeve; and wherein the retaining sleeve is secured axially between the radially extending flange and the locking ring, thereby preventing axial movement of the retaining sleeve relative to the axial pin while permitting rotation of the retaining sleeve relative to the axial pin; a plug body having a central bore housing the central conductor and the axial pin and carrying at its outer surface a plurality of annular electrical contacts; wherein the plug body houses a plurality of connection conductors, each connection conductor electrically connected with a different annular electrical contact; wherein the central conductor is coated with a lubricant to reduce rotational friction and facilitate rotation of the central conductor within the central bore.