A closing/opening system for a case of a timepiece is defined particularly in first and second parts of the case. The system includes a device for producing a mechanical connection, particularly a bayonet connection between these first and second parts and a device for creating a friction torque between these first and second parts. The device for creating a friction torque includes tightening faces to cooperate with one another when closing/opening the case and which are defined in the first and second parts. The system further includes a tightening element in one of these two tightening faces. The tightening element generates a constant friction torque during a course of travel of one of the two parts relative to the other when closing/opening the case of the timepiece.

A case includes a main case body and an exterior member. The exterior member is welded to the main case body with laser light. The laser light is irradiated onto a welding part of the main case body and the exterior member and reflected at an irradiation surface, and a reflected-light receiving part is formed at a position where the reflected laser light is irradiated according to an incidence angle of the laser light to the irradiation surface. The exterior member includes a flange part which is disposed on an upper side of the main case body and which protrudes toward an inner side of the main case body. A lower surface of the flange part includes a module receiving surface which receives a module to be disposed inside the main case body, and the reflected-light receiving part is formed at a part of the module receiving surface.

A water-resistant watch case of a diving watch, includes a back mounted on a lower side of a middle part, and a crystal mounted on an upper side of the middle part. The crystal includes an annular peripheral surface mounted by a first portion of an annular gasket made of amorphous metal on an inner annular surface that is complementary in shape, on the upper side of the middle part. A second portion of the gasket on the first portion of the gasket maintains the crystal against the middle part. The annular peripheral surface of the crystal is inclined towards the inside of the watch case at an angle less than 90° relative to a central axis perpendicular to the plane of the watch case to distribute stresses between the crystal and the middle part due to the water pressure.

A case includes a main case body and an exterior member. The exterior member is welded to the main case body with laser light. The laser light is irradiated onto a welding part of the main case body and the exterior member and reflected at an irradiation surface, and a reflected-light receiving part is formed at a position where the reflected laser light is irradiated according to an incidence angle of the laser light to the irradiation surface. The exterior member includes a flange part which is disposed on an upper side of the main case body and which protrudes toward an inner side of the main case body. A lower surface of the flange part includes a module receiving surface which receives a module to be disposed inside the main case body, and the reflected-light receiving part is formed at a part of the module receiving surface.

A system for fastening a horological movement of generally circular shape in a watch case, this fastening system including a casing ring wherein the horological movement is disposed, the casing ring extending between an upper portion and a lower portion, the horological movement being fastened in the lower portion of the casing ring using a first and a second fastening device disposed at two opposite ends of a diameter of the horological movement, at least a third fastening device, angularly offset relative to the first and second fastening device and fastened in the upper portion of the casing ring, allowing the horological movement to be blocked in the casing ring.

Wearable electronic devices, such as watches, can provide a seal member to form a fluid barrier between an inner chamber therein and outer chambers, as well as an external environment. Components within the sealed inner chamber can be protected from elements from the external environment (e.g., water ingress, etc.). The components outside of the inner chamber can include sensor modules and the like. Such components can be operatively connected to components within the inner chamber, for example, by a flex circuit that extends across the seal member. The component can interact with a watchband when coupled to a watch housing of the watch.

The present disclosure includes a case body configured to accommodate a movement, and a rotating bezel attached to the case body. The rotating bezel includes a bezel body having an annular shape, and a display plate detachably attached to the bezel body. An engagement protrusion protruding toward the bezel body and being continuous in a circumferential direction is provided at the display plate. A plastic gasket having an annular shape is disposed between the bezel body and the engagement protrusion. A first recessed portion is provided in an outer circumference of the display plate. A second recessed portion is provided in the engagement protrusion of the display plate so as to correspond to a position of the first recessed portion.

A sealing system (10) for a case (100) of a timepiece (200), comprising: a first seal (11) intended to be inserted between a middle (2) on one side and a ring (3) and a glass (4) on the other side, a second seal (12) intended to be inserted between a middle (2) and a glass (4), the first and second seals being two distinct seals, in particular two independent seals or two separate seals, and/or the first and second seals being made of two distinct materials.

A case includes a main case body and an exterior member. The exterior member is welded to the main case body with laser light. The laser light is irradiated onto an irradiation surface. A welding part of the main case body and the exterior member is formed on the inner periphery surface extending along a height direction of the case and is formed such that the irradiation surface is perpendicular to the incident laser light.

A timepiece component for a timepiece case or for a timepiece includes a first ring, at least one decorative and/or display element, a second ring, and an elastic element mounted so as to bear on the first ring and to urge the at least one decorative and/or display element toward the second ring.