An apparatus for fastening an external element or display element of a watch

摘要

Problem to be solved: to provide an apparatus for fastening an external element or a display element of a watch.An apparatus for fastening an external or a display element to a clock structure comprises a holding key 1.The holding key 1 comprises a post 2 fastened to the structure and a head 9 having a flat head flange 3.The flat head flange 3 is provided with a first lip 31.The first lip 31 is in pressure contact with the surface of the fastening element integrated with the display element.The first lip 31 is separated by edge portions 51 and 52 which are not in the same plane.The holding key 1 has a second lip 6.The second lip 6 is coupled to the edge portions 51 and 52 and retreats in the radial direction with respect to the peripheral portion of the first lip 31.The second lip 6 has upper surfaces 51 and 52 which are tapered to the upper surface of the first lip 31.Diagram