It would be better if you can make a sample, but this is not a requirement. It can be a drawing or even an idea, but it must be a drawing.
Nowadays, invention patents are getting closer and closer to the limit. I estimate that your invention is likely to be a utility model patent. Please consider it carefully.
Conditions for applying for a patent: 1. The application documents must be complete: request, description, claims, abstract, pictures or photos; 2. The invention (result) should have "three properties" (novelty) nature, creativity, practicality); 3. Our country’s patent review system is: early disclosure and request for review (substantive review) for invention patent applications; formal review for utility model patents and design patents. (The so-called formal examination is also called the registration system or the non-examination system. The main content of the examination is whether the application documents meet the requirements and whether the invention is duplicated. After it is published in the gazette, it will be authorized if there is no objection within the time limit); 4. Put everything in order Once you are ready, you can accept it on the same day and you will be legally protected on the same day.
Fees: Application fee and invention application review fee, the amount (in RMB) is: invention patent application fee 950 yuan (including 50 yuan printing fee); utility model patent application fee 500 yuan; design patent application fee 500 yuan; the invention application review fee is 2,500 yuan.