Provided is an electronic device. The electronic device includes: a main body mounted with an electronic unit including a controller, including a bezel disposed at the outer side thereof, and having a locking groove formed in the bezel; and a band part mounted with an additional device for exchanging an electric signal with the electronic unit and an electronic part providing information related to the additional device for the electronic unit, and including a coupling part detachably coupled to the locking groove. Here, the controller switches an operation mode of the main body according to the information related to the additional device provided by the electronic part when the main body and the band part are coupled to each other. Thus, when the band part mounted with the additional device is connected to the main body, the operation mode of the main body is automatically switched to a mode corresponding to the additional device, thereby providing convenience of use.

A watch case (10) including a middle (11), a bezel (12) and a connecting ring (13) arranged rotatable relative to the middle (11). The connecting ring (13) and the bezel (12) each include at least one interlocking member cooperating with each other when the bezel (12) is fastened to the middle (11) in order to eliminate any relative mobility between the connecting ring (13) and the bezel (12), the connecting ring (13) and the bezel (12) being configured so that when the bezel (12) is subjected to a force that goes against the resilient restoring force, the interlocking members no longer cooperate with each other so as to allow rotational and translational freedom between the connecting ring (13) and the bezel (12).

An exterior sub-assembly for a timepiece or watch or piece of jewelry, including a first component and a second component, arranged for a bayonet mount between two rims and two wings comprised in the first component and the second component, and capable of occupying an assembled and indexed position of the first and second components, this sub-assembly including a third ring-shaped component inserted between the first and second components, fixed in rotation with respect to one of these components and including an elastically deformable area, opposing a variable resistance torque to any relative tangential torque between the first and second components, and including a catch cooperating with a relief portion of the component that is not connected to the third component, wherein one particular catch angularly indexes these first and second components.

An exterior sub-assembly for a timepiece or watch or piece of jewelry, including a first component and a second component, arranged for a bayonet mount between two rims and two wings comprised in the first component and the second component, and capable of occupying an assembled and indexed position of the first and second components, this sub-assembly including a third ring-shaped component inserted between the first and second components, fixed in rotation with respect to one of these components and including an elastically deformable area, opposing a variable resistance torque to any relative tangential torque between the first and second components, and including a catch cooperating with a relief portion of the component that is not connected to the third component, wherein one particular catch angularly indexes these first and second components.

Disclosed is an electronic device electronic device that has a single part, which allows a wheel dial to be fixed to a housing of the electronic device, and prevents the wheel dial from moving horizontally and vertically relative to the housing.

Facilitate operations to release a bezel from a rotation prevented state and to rotate the bezel and avoid erroneously releasing the rotation prevented state. A timepiece includes a restrictor having engaging teeth and being movable between a restricted position and a release position by engaging/disengaging the engaging teeth with teeth of the bezel. The timepiece also has a holding mechanism holding the restrictor between a held state, i.e., restricted position and a non-held state. i.e., the release position. The holding mechanism includes two push-buttons and a release mechanism including a spring bar and engaging hole. The release mechanism switches the restrictor to the non-held state irrespective of a continuance of applying the pressing operation forces after the pressing operation forces are applied simultaneously to the two push-buttons.

Disclosed is an electronic device electronic device that has a single part, which allows a wheel dial to be fixed to a housing of the electronic device, and prevents the wheel dial from moving horizontally and vertically relative to the housing.

A notching system (100) including a spring (1) having a first toothset including n first teeth (11a, 12a) a first member (2) having a second toothset including m second teeth (22a, 22b), and a second member (3) mounted so as to be movable, in particular mounted so as to be rotatable, with respect to the first member (2), the first and second toothsets being arranged such that, through their interactions, they define p notches or indexed positions, the spring (1) including at least two elastic arms (11, 12), and at least one first pivot connection element (1b) between said two elastic arms (11, 12), the second member including at least one second pivot connection element (3b) cooperating with the at least one first pivot connection element (1b) in order to create at least one pivot connection between the spring (1) and the second member (3).