Portable object comprising a case, a removable bracelet and a system for attaching the bracelet to the case

A portable object comprising:

• a case having a middle, a bracelet, and an attachment system for removably securing each end of said bracelet to the middle, the middle comprising two longitudinal cavities configured to form a slide bar, each end of the bracelet comprising a fastening head that has a complementary shape and that is configured to cooperate, by sliding, with one of the longitudinal cavities to form the attachment system,
• wherein said fastening head comprises an end flange made of a viscoelastic material, and
• wherein the attachment system comprises viscoelastic fitting means for locking an axial movement of said fastening head inside the longitudinal cavity by a viscoelastic response of the end flange, the viscoelastic fitting means being formed by a cooperation of a rigid locking protrusion, provided in each of the longitudinal cavities, and configured to deform the end flange made of the viscoelastic material upon insertion of the bracelet, said locking protrusion being configured to fit inside a recess made in the end flange made of the viscoelastic material in order to lock the axial movement of the fastening head.