Get a Patent Lawyer, have $10,000 ready for the legal aspects of the patent, and prepare for a 2 or 3 year wait for the patent.

Meahwhile - Send yourself a very detailed sketch of this idea via certified mail, sign for it but do not open it, and keep it in a safe deposit box at a bank. This will be valuable later if someone else decides to "invent" your product... your certified letter (dated, signed, and sealed) will prove you had the idea first and you WILL BE entitled to rights of the patent.

If it has a name that will be easily used in the near future, trademark the logo and copywright the name - again for your protection.

Once you have all of this started and your patent is pending, then and only then, you can approach the big boys to produce it under your patent (pending.)