Samsung is often accused of copying Apple, that accusation is also the basis of a very long legal battle between the two companies, which is why it's very surprising to see that Samsung would file a patent with some very familiar looking images. Its patent details swapping mechanisms for smartwatch bands and features design drawings of what is clearly the Apple Watch, based on that smartwatch's marketing renders.
Samsung has used Apple Watch drawings alongside its own design drawings to showcase the different methods it has developed of swapping bands on smartwatches. Design elements of the Apple Watch are clearly noticeable in the patent drawings which would lead my to suggest that Samsung is actively gaining inspiration from its competitor's product. Surely this won't help the case of those who argue that claims of Samsung copying Apple are overblown. As to why Samsung thought this would be a good idea, well it's anybody's guess right now.