Under the legislative pressure and to deal with an economy of raw materials and energy used to transform this matter, designers have to consider more deeply the aspects related to the disassembly of the products for recycling, remanufacturing or reuse. Indeed, these "recoveries" of product/components/materials will modify the production and recycling processes as well as the design choices. In particular, the disassembly operations have to be taken into account in the first stages of the product design, during the conceptual design phase, to obtain a good compromise concerning the final structure of the product. We will present in this article the principles for a future tool using virtual reality. This tool will be used during the conceptual phase of the design to assist the designer to jump from a functional model to the structure of the product by helping the definition of the components, of the connections and thus of the first structure of the product.