A couple of points:
- the very fact you can point to something like what you're thinking of would suggest it's unlikely to be patentable (it has to have a significant degree of innovation)
- getting patents is very expensive these days, so unless you're sure it'll make you more than the cost of getting it, it's probably not worth doing
- if you're more interested in licensing the idea rather than manufacturing it yourself, you can use a non-disclosure agreement (NDA) when talking to prospective licensees: much cheaper than getting a patent and it would enable you to get feedback whilst still protecting the idea. The challenge here thouigh will be to get to talk to a relevant decision maker.