Designing a Mechanism for Two Half Circles' Synchronous Rotation

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A mechanism is being designed for two half circles to rotate synchronously, utilizing springs and a single input rotational source. The discussion includes ideas about incorporating a crank and slider system to facilitate the opening and closing motion. There is a request for guidance on effectively using springs within this mechanism. Additionally, participants are prompted to consider the purpose of the half circles' movement and whether they function as mirror images. Understanding these dynamics is crucial for developing the mechanism effectively.
Micheal_Leo
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Regards Respected Teachers and Members

I would like to draw a mechanism that two half circles should rotate synchronous close and open as a result gears will rotate at same Value , i would like to use springs in this mechanism between circles , the other idea i know that use crank and slider , link from slider attached to both circles as a result opening and closing will happen , but i would like to use springs and the input rotational source should be one as shown in figure

Need guidance about spring using

Thank you

Mechanism Video
 

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I think we need to step back and look at why the mechanism needs to move the two quadrants or part circles. What will the quadrants be doing ?

Do the part circles move as mirror images about some plane ?
 

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