Study On Friction Hinge Design Parameters Which Affecting Torque And Life-cycle

With the development of 3C industry,the consumer electronics competition becomes increasingly fierce.Customers are not only demanding hardware and software,but also demanding more on mechanical components.Many electronic manufacturers,such as Apple,Google,Sony and Lenovo have increased their R&D investment on mechanical components to have good experience.In this case,friction hinge have importance function to connect display screens and motherboard modules in mobile phones,laptops,electronic dictionaries etc.Hinge torque impact customer’s experience deeply.If the torque is too high,the device is not convenient to open and close.If the initial torque is too low,the display module cannot be effectively supported.For having a high-quality hinge,it is necessary to have a good initial torque design and the less attenuation torque rate in lifecycle test.Doing research on that process in both theory area and practice,this paper attempts to conduct an in-depth study on the torque and lifecycle of friction hinge from the establishment of mathematical model,material selection and processing technology,etc.The main contents are as follows:1.Analyzing this hinge,to develop mathematical models and summarize the theoretical formula of hinge torque.It provides theoretical foundation for the similar projects develop in the feature,so that to save development time and FEA cost.2.Through the analysis of the key materials properties,the materials selection principles are summarized,and provide reference and guidance for the selection of materials for follow-up projects.3.By studying the failure mode and hinge life,find out the relationship between hinge life and processing technology.Improve the yield and hinge performance through the improvement of parts processing technology.In this paper,derived the theoretical formula for hinge torque calculating,and verify it through experiment.Studied the parameters which affecting the hinge life,and introduced some new techniques which is great significant in the hinge production.