Inner box for a vehicle tailgate including a technical panel fitted thereto

1. An inner box for a motor vehicle tailgate, the inner box comprising:

a frame of the inner box;

a set of technical elements for components to pass through or be secured to; and

an outer skin attachable to the frame; wherein:

said technical elements are carried by a technical panel fitted onto said frame,

said frame having at an upper portion thereof a first opening configured to accommodate a rear window, and at a lower portion thereof a second central opening configured to receive said technical panel therein,

said frame being made of a first material and said technical panel being made of a second material less dense than said first material, and

the outer skin being attachable to the lower portion and covering the technical panel without being attached to the technical panel.

2. Inner box according to claim 1 , wherein an average thickness of the technical panel is less than an average thickness of said frame.

3. Inner box according to claim 1 , wherein the second material is a thermoplastic material.

4. Inner box according to claim 1 , wherein the second material is selected from the following materials:

polypropylene (PP);

polyamide (PA);

polyethylene (PE);

acrylonitrile butadiene styrene (ABS);

polyethylene terephthalate (PET);

polystyrene (PS);

polycarbonate (PC);

polymethylmethacrylate (PMMA);

as well as all variants and all combinations of these materials or variants.

5. Inner box according to claim 1 , wherein the first material is a composite material with thermoset resin.

6. Inner box according to claim 5 , wherein the first material is one of a SMC reinforced thermoset material and a BMC reinforced thermoset material.

7. Inner box according to claim 1 , wherein the technical panel integrates by molding, or is integrally formed with, at least one of the following elements:

holes for components including at least one of wires, linkages, pipes, and attachment interfaces to pass through;

attachment interfaces for systems including at least one of a motorized lock and a window washer motor;

mechanical strengthening shapes including at least one of ribs and bosses;

interfaces for attaching said technical panel to said frame of the inner box.

8. A method for manufacturing an inner box of a motor vehicle tailgate, the method comprising:

providing a frame of the inner box, made of a first material, having at an upper portion thereof a first opening to accommodate a rear window, and at a lower portion thereof a second opening;

providing a technical panel made of a second material less dense that said first material, having a set of technical elements, such as holes for components to pass through or be secured to;

attaching said technical panel to said frame; and

attaching an outer skin to the lower portion so as to cover the technical panel without being attached to the technical panel.

9. Method according to claim 8 , wherein said technical panel is fastened by screwing, bonding, crimping, overmoulding, hollowing out or a combination of these techniques.

10. The inner box of claim 1 , wherein the outer skin is a detachable outer skin.