The example you gave seems a bit inappropriate, but I probably understand what you mean.
If your replacement is just to replace the rubber pad with another item, and there is not enough innovative structure to support your change. Then your kind can only be deduced and foreseeable, and there is no creativity.
If you apply it to different fields, then it depends on the level of your writing and the search scope and detail of the examiner. Invention will definitely not work, and at most it will be new. . With luck, you might even be able to authorize it.