The company has now applied for and obtained a patent for the luggage. Then this bag must be different or improved to a certain extent from ordinary bags (that is, it is creative), otherwise it will not be granted a patent if it is just a simple imitation. This bag should have a unique technical solution, and it is this technical solution that it protects. In other words, bags that only contain this technical solution will infringe.
Therefore, simple imitation by others constitutes infringement. As for how to judge, there are clear restrictions in the claims in the patent document.