The invention concerns a method for unlocking a function of a device using a timepiece, the timepiece including: a display device including display elements; control means able to drive the display elements in a predefined animation sequence; the method including the following steps: the timepiece is placed in front of detection means; the control means are actuated so that they drive the display elements in the predefined animation sequence; the predefined animation sequence is detected by the detection means; the detected animation sequence is compared to a reference animation sequence; if the detected animation sequence is identical to the reference animation sequence, then the function is unlocked.

A display mechanism for a watch and a watch including the display mechanism, which includes a display for displaying information, a first and second mobile elements and a support, so that when the first mobile element moves with a first primary speed, the second mobile element moves into a first position so as to cover the display and when the first mobile element moves with a first secondary speed, the second mobile element moves into a second position so as to expose the display. Thus, the display can be exposed which allows to maximize the display surface when information is present on the display.

The present application provides a timer, including a base, a driving shaft, and an indicator arm. The driving shaft is rotatably mounted on the base and selectably rotates relative to the base. The indicator arm includes a second support and a plurality of hour blocks. The second support is rotatably connected to the driving shaft. The hour blocks each include a second block body and a second gear. The second block body is rotatably connected to the second support. The second gear is fixedly connected to the second block body. Second protrusion is correspondingly arranged on a rotation path of the second gear around the driving shaft. The second gear has second tooth grooves. The second protrusion selectably extends into the second tooth grooves to drive the second gear to rotate relative to the second support so as to drive the hour blocks to rotate relative to the second support.