Analyses And Improvements Of Repeater

Minute repeater,tourbillion and perpetual calendar are the top three complication technologies of mechanical watch design,especially minute repeater,as it is the only one which combines the visual and auditive sense.As it conveys people's expectation for aesthetics,it is more than just a watch.The repeater mechanism is the core structure of minute repeater watch.The working principle is the sound hammer knocking on the gong to make multiple sounds to present different times.It is an application achievement of acoustics and dynamics and a perfect combination of visual and sound art.This paper analyzes the six components of minute repeating mechanism,respectively are energy supply,rate limiting part for striking,start portion for striking,repeater,sound part and insurance part,also including the research and improvements for the key parts.This paper mainly consists of the following parts:1.The specific actions and interactive relationship of the energy supply,rate limiting for striking,start portion for striking,repeater,sound part and insurance part in minute repeating mechanism;2.The cooperating applied force of axle and spring in minute repeating mechanism3.The research about reducing the space for energy supply barrel;4.The research about the selection of medium in the rate-limiting flywheel;5.How to define the starting time point during the striking started phase;6.How to use the movement's barrel to supply the striking power;7.How to avoid the interference problem between the striking system and the winding system;8.The improvements for the sound quality;9.Specific method for use the Solidworks to the finite element force analysis for the lever spring;10.The minute repeat mechanism's assembling steps and notes.Explain the important role of manually adjust during the assembling process;11.The influence of the sound spring on the watch sound.Adjust the sound effect by adjusting the position,material,shape and space of the sound spring.