Drive module incorporating an MEMS micromotor, manufacturing process for this module, and time piece equipped with this module

摘要

#CMT# #/CMT# The module (13) has a plate (30) e.g. silicon wafer, of crystalline material with an upper layer in which a micro electromechanical system type micro motor (36) is engraved, where the module is in V-shape. A pinion is connected to a rotor (42), and is meshed with a wheel in a mesh area (70) situated close to a peripheral edge (72) of the plate. The rotor is arranged on the plate so as to minimize a distance between a peripheral edge of the rotor and the edge (72). Diameter of the pinion is higher than that of the rotor so as to be in cantilever relative to the plate in the area. #CMT# : #/CMT# An independent claim is also included for a method for fabricating a driving module. #CMT#USE : #/CMT# Driving module for driving a gear-train of timepiece (claimed) such as wristwatch, and for being meshed with a wheel of the timepiece. #CMT#ADVANTAGE : #/CMT# The driving module is in V-shape for optimizing output of the micro motor with respect to a surface of the plate, and for optimizing a surface of the crystalline material used for forming the micro motor and driving modules. The driving module is mounted directly on the plate, which permits to eliminate a case for minimizing number of components, for facilitating assembling of movement, thus minimizing encumbrance of driving unit. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic top view of a driving module. 13 : Driving module 28 : Input wheel 30 : Plate 36 : Micro electromechanical system type micro motor 38, 40 : Actuators 42 : Rotor 70 : Mesh area 72 : Peripheral edge.