Abstract: A removable case back of an electronic or electromechanical watch case, the case back allows the wireless charging or recharging of a power source. The case back includes a first multi-function sub-assembly having a buzzer, an inductive coil on or integrated in a printed circuit board, the inductive coil being covered by a magnetic shield on an inner side of the watch case, and a second multi-function sub-assembly on the first multi-function sub-assembly having an enclosure structure for accommodating the power source, such as a battery or an accumulator.

Abstract: A fastening method is for fastening at least one display element of a watch using a fastening device. Indeed, the at least one display element is fastened thanks to the fastening method via the fastening device. For this, it is necessary to provide the at least one display element, at least one movement, and at least one split ring, then to deform the at least one split ring so as to adapt to the at least one display element before fastening the at least one split ring with the at least one display element to the at least one movement.

Abstract: A light sensor includes first and second neighboring photodiodes that are separated from each other by a space. A light-absorbing material is positioned at a location which is vertically above the space between the neighboring photodiodes. A first multilayer interference filter includes a central portion located vertically above the first photodiode and a peripheral portion that at least partly extends to rest on top of and in contact with the light-absorbing material.

Abstract: A removable case back of an electronic or electromechanical watch case. The case back includes an internal electronic device provided with functions to allow the wireless charging or recharging of a power source. The case back includes two multi-function sub-assemblies separate from the electronic device. A first multi-function sub-assembly includes a buzzer, an inductive coil on or integrated in a printed circuit board, the inductive coil being covered by a magnetic shield on an inner side of the watch case. A second multi-function sub-assembly on the first multi-function sub-assembly includes an enclosure structure for accommodating the power source, such as a battery or an accumulator.

Abstract: A skeleton watch includes a case middle which defines an interior space, a crystal and a back cover fixed to the case middle on either side of the middle to enclose the interior space, and a movement. The movement includes an openworked frame having a front face and a back face, the frame including an outer perimeter formed by two side positions, a top bar that connects between upper ends of the side posts, and a lower platform connected to lower ends of the side posts. The frame includes a central island positioned within the outer perimeter. The movement also includes a minute hand and an hour hand mounted on a central arbor integral with the frame. The movement also includes a motor having an electromagnet that extends outside of the outer perimeter of the frame in a radial direction from the central arbor.

Abstract: A light sensor includes first and second neighboring photodiodes that are separated from each other by a space. A light-absorbing material is positioned at a location which is vertically above the space between the neighboring photodiodes. A first multilayer interference filter includes a central portion located vertically above the first photodiode and a peripheral portion that at least partly extends to rest on top of and in contact with the light-absorbing material.

Abstract: The invention relates to a portable electronic device including a case and a watchband link attached to said case, the case comprising a pair of horns, between which is disposed a female electrical connector, the link comprising a male electrical connector disposed at the end of the link and adapted to make an electrical connection with the female electrical connector when the link is mounted on the case. According to the invention, each horn comprises a bar intended to come to be housed in an opposite housing of the watchband, the bars engaging successively in a guide groove and then in a locking groove formed in the link, the device comprising a manual actuation member for moving the bars into a retracted position.

Abstract: The invention relates to a portable electronic device including a case and a watchband link attached to said case, the case comprising a pair of horns, between which is disposed a female electrical connector, the link comprising a male electrical connector disposed at the end of the link and adapted to make an electrical connection with the female electrical connector when the link is mounted on the case. According to the invention, each horn comprises a bar intended to come to be housed in an opposite housing of the watchband, the bars engaging successively in a guide groove and then in a locking groove formed in the link, the device comprising a manual actuation member for moving the bars into a retracted position.

Abstract: The invention relates to a skeleton watch including: a case middle; a movement including: a frame; time display means; a reduction mechanism meshed with the time display means; a motor including: an electromagnet; a stator; a rotor bearing a pinion meshed with the reduction mechanism; an electronic circuit including: a piezoelectric quartz; a control circuit connected to the quartz and to the stator by means of electrical conductors; an additional plate which carries the electronic circuit, said additional plate being distinct from the back cover and fixed to the frame.

Abstract: Bracelet clasp (1) with a buckle (10) having strands carrying shouldered pins (6, 7) cooperating with eyes (8, 9) in the buckle, with two pushers (11, 12) antagonistic against springs, each controlling two bolts (15, 16; 17, 18), where the first pusher (11) integrally drives a first bolt (15) opposite a first pin (6) and a second bolt (16) opposite a second pin (7), this first pin (6) and a second bolt (18) opposite this second pin (7), so that only the combined actuation of the two pushers (11, 12) drives all of the bolts (15, 16, 17, 18) through their entire release travel to release these pins (6, 7) and one of the bolts (17, 18) remains locked during insertion of a pin (6, 7) in an eye (8, 9).

Abstract: Bracelet clasp (1) with a buckle (10) having strands carrying shouldered pins (6, 7) cooperating with eyes (8, 9) in the buckle, with two pushers (11, 12) antagonistic against springs, each controlling two bolts (15, 16; 17, 18). The first pusher (11) integrally drives a first bolt (15) opposite a first pin (6) and a second bolt (16) opposite a second pin (7), and the second pusher (12) independently drives a first bolt (17) opposite said first pin (6) and a second bolt (18) opposite said second pin (7), so that only the combined actuation of the two pushers (11, 12) drives all of the bolts (15, 16, 17, 18) through their entire release travel to release said pins (6, 7) and one of the bolts (17, 18) remains locked during insertion of a pin (6, 7) in an eye (8, 9).