According to Baidu Library, sample boxes placed in pharmacies belong to the category of medical devices, because they are used to store and display medical devices. In the definition of medical device, it includes equipment, instruments, machines, components and other related items used for diagnosis, treatment and prevention of medical diseases.
Sample boxes are usually used to store and unfold sphygmomanometers, stethoscopes, syringes, masks, infusion sets, etc.