Exerciser for wrist muscle, has rotor, whose external wall includes partition extending between axles to divide cavity into chambers, and openings defined in external wall, where openings communicate with chambers

摘要

The exerciser (100) has a retention ring intercalated between upper and lower case elements (10, 20) of a case and defining a set of openings. A rotor has axles extending with respect to each other in an opposite manner and accommodated for rotating a cavity in the associated openings, where the cavity is formed between the axles. An external wall of the rotor has a partition (44) extending between the axles to divide the cavity into two sets of chambers (441). Another set of openings (46, 47) are defined in the wall and communicate with the chambers.