Tight assembly for electrical connector

1. An assembly for an electrical connector comprising:

a resilient mat seal having two main surfaces and a plurality of channels extending between said two main surfaces, each channel being configured to receive a respective electrical wire, and wherein an annular sealing lip is provided within said channel and extends from a channel wall towards a center axis of said channel; and

at least one sealing sleeve configured to entirely surround a portion of the electrical wire to be introduced in one of said channels and tightly maintained on said wire; wherein the sealing sleeve has a rear portion extending a majority of a length of the sealing sleeve which has an entire smooth outer surface and an outer cross-section of said rear portion being configured such that said rear portion of the sealing sleeve and the channel lip are in tight engagement with each other when the wire provided with said sealing sleeve is positioned in a respective one of said channels.

2. Assembly according to claim 1 , further comprising at least one first electrical wire and one terminal fitting fixed to the first electrical wire, wherein said sealing sleeve surrounded the portion of the electrical wire neighboring the terminal fitting.

3. Assembly according to claim 2 , further comprising at least one second electrical wire which is not surrounded by said sealing sleeve, wherein the cross-section of the second electrical wire is substantially the same as the cross-section of said sealing sleeve.

4. Assembly according to claim 3 , wherein the sealing sleeve is partly held by the terminal fitting.

5. Assembly according to claim 1 , wherein the mat seal is integrally molded.

6. Electrical connector intended to be connected to a counterpart electrical connector along a plugging axis, comprising:

a plastic housing provided with a plurality of channels extending parallel to the plugging axis, the plastic housing having a front part and a rear part mounted together, the front part having a front face provided with metallic pins or crossing holes for respectively receiving holes or pins of the counterpart electrical connector;

a resilient mat seal between the front part and the rear part of the plastic housing, the resilient mat seal having two main surfaces and a plurality of channels extending between said two main surfaces and corresponding to the channels of the plastic housing, and wherein an annular sealing lip is provided within each channel of the resilient mat seal and extends from a channel wall towards a center axis of said channel of the resilient mat seal;

electrical wires engaged in said channels of the plastic housing and in said channels of the mat seal;

at least one sealing sleeve entirely surrounding a portion of at least one electrical wire engaged in one of said channels of the resilient mat seal and tightly maintained on said wire, wherein the sealing sleeve has a portion extending a majority of a length of the sealing sleeve with an entirely smooth outer surface and an outer cross-section of said portion which is sized and shaped such that said portion of the sealing sleeve and the channel lip are in tight engagement with each other when the wire provided with said sealing sleeve is positioned in a respective one of said channels of the resilient mat seal.

7. Electrical connector according to claim 6 , wherein the electrical wires are fixed to metallic terminal fittings.